The 20th century began on January 1, 1901, and ended on December 31, 2000.

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Why did Hitler attack the Soviet Union when he was still busy fighting the United Kingdom?

This has always bothered me. Everyone knows that having to fight on two opposite fronts at once is bad... and it's also a well known fact that every European country which tried to invade Russia has ...
55
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10answers
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Why didn't Imperial Japan attack the Soviet Union during World War 2?

Japan and the Soviet Union shared a common border in Manchuria and the German invasion of the Soviet Union weakened the Soviets greatly. In view of the advantages to Japan in seeing the Soviet Union ...
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6answers
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Why did the USSR give Crimea to Ukraine?

In 1954 Soviets transferred Crimea from Russian Soviet Republic to Ukrainian Soviet Republic. Why is this strange? The whole act, at least officially, was meant to be "a gift", a token of ...
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4answers
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How did Israel win the Six-Day War?

Considering Israel fought several Arab countries, which had troops largely outnumbering the Israeli, how did they manage to win the war decisively, with much fewer casualties than the Arab countries? ...
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8answers
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Why didn't France and UK invade Germany September 3rd 1939?

On September 3rd 1939, when UK and France declared war on Germany, both ordinary Polish people and government officials became enthusiastic. There were spontaneous demonstrations of support for the ...
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9answers
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Why did Hitler declare war on the USA?

Since there had not been any offensives launched by either side against the other, why declare war just because Japan had attacked the USA?
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3answers
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Did World War II-era bombs actually whistle?

In WWII-era films and newsreels, aerial bombs are often shown making a whistling sound as they fall; starting high pitched, then decreasing as the bomb approaches the Earth (example here, starting at ...
29
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7answers
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Why did Chamberlain act to appease Hitler leading up to the outbreak of World War 2?

There are accounts that British Prime Minister Chamberlain sought to appease Hitler because he just didn't want Britain involved in a war at that time. Others also argue that Chamberlain was naive and ...
29
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2answers
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Why does German money from the 1940s not bear Nazi symbols?

I have a 5-mark German banknote (I think from 1941 or 1942), looking exactly like this: I am curious why the banknote not only does not bear a portrait of Hitler, but doesn't include any German state ...
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5answers
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When did the practice of formally “declaring war” cease and why?

Here's a detailed description of ambassador Neville Henderson being received by the foreign ministry in Berlin in 1939. Perhaps the most famous example. He came in looking very serious, shook ...
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8answers
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Why did Britain and France not declare war against the Soviet Union when it invaded Poland in WW2?

At the beginning of WW2, although they were slow in actually attacking Germany, Britain and France did declare war against it after Germany invaded Poland. The reason for this was the treaty where ...
25
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4answers
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Has Britain's 1940 invasion of Iceland been downplayed by historians?

On the face of it Operation Fork (Britain's invasion of Iceland in 1940) wasn't so terribly different from Germany's territorial landgrabs in 1939 and 1940. Britain and her allies will have ...
24
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1answer
849 views

Did the end of the British Raj in India create an economic loss for Britain?

I know the economic downturn of the World War and the victory of the Labour Party played some role in Britain deciding to quit India. Did GB have any serious economic implications because of this? ...
22
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10answers
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What was wrong with Hitler's left hand?

So I was watching Downfall last night (good movie by the way) and I noticed that whenever Hitler walked around, the movie always showed him with his left hand behind his back and it was always kind of ...
20
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5answers
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Why did Italy abandon its alliance with Germany in WW1 and join the Allied side?

Before WW1 Italy was part of an alliance with Germany and Austria-Hungary, yet it didn't join them when the war started and it even joined the Allied side later during the war. Why did Italy do this? ...
19
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7answers
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Why wasn't the Republic of Ireland invaded (by either side) in WW2?

Ireland was neutral in WW2, however it was never invaded (by either side). How come? Why wasn't Ireland invaded by the UK to prevent the Germans invading? Why didn't germany invade ireland? It would ...
19
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3answers
2k views

Why didn't Moldova unite with Romania?

Towards the collapse of the USSR, nationalism rose in Moldova. Nationalists proclaimed the linguistic and ethnic identity between Moldovans and Romanians. It seems that they strove toward unification ...
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3answers
890 views

How was the modern geographic boundary between Europe and Asia decided?

Wikipedia puts the boundary as: The modern definition of Europe delimits it from Asia at the Aegean Sea, the Dardanelles-Sea of Marmora-Bosporus, the Black Sea, along the watershed of the Greater ...
19
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1answer
217 views

What courses would have been required to get a B.A. in America in the 1930s?

I know in the early 20th century the liberal arts curriculum was focused much more on the classics, but am interested in knowing specifically what courses were required to graduate during the Great ...
19
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1answer
403 views

How did people react to Cavendish bananas when they first replaced the Gros Michel strain?

I was reading that the bananas we eat today (Cavendish) weren't particularly popular until the 50s, when the more popular Gros Michel variety was virtually wiped out by a nasty disease. Apparently ...
18
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4answers
5k views

Why didn't the US choose to demolish Tokyo with an atom bomb?

Tokyo was Japan's capital. Why didn't the US choose Tokyo to demolish with Atom Bomb? Bonus Question: What factors decided to bring Hiroshima and Nagasaki on table?
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4answers
421 views

What were the reasons for making Prohibition a constitutional amendment?

What were the reasons that the Prohibition in the United States was passed as a constitutional amendment, rather than a normal federal law, or a set of state laws?
17
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1answer
233 views

North Korean Famine

I have just read an article (in Russian) about the most recent weird news from N.Korea: women are (again) not allowed to ride bicycles. After you've finished splitting your sides with laughter, allow ...
17
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1answer
279 views

Who, if any, in JFK's inner circle argued against the plans for the Bay of Pigs invasion?

Political discussions leading up to the Bay of Pigs invasion are a notorious example of 'groupthink' and the failure of a committee in coming to a well-informed decision. Accounts of the ...
16
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6answers
461 views

Japan is known for being isolationist, so what cultivated its history of interventionism in the 20th century?

For much of its history, Japan was a very isolationistic country, and in fact, even in modern Japan, there is still a strong isolationist attitude among the Japanese people in some ways. During the ...
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3answers
854 views

Why was the Western Front so static in World War I?

Once the German advance was halted, neither side could seriously advance for two years. This seems like an extraordinarily long time. Why didn't anyone succeed at going around the trenches or striking ...
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4answers
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What were Hitler's religious beliefs?

Hitler is often cited as an example of an evil atheist (along with Stalin and Mao). But there are several quotes from him that seem to indicate he believed in the Christian God - and even used this to ...
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10answers
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What was the ratio of German to Soviet losses on eastern front during different stages of the war?

I've read somewhere that the ratio of Soviet to German casualties on the eastern front was 1.4 for the whole war. But what about data for different stages of the war? (this ratio wasn't constant after ...
15
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3answers
470 views

Why were the British so reluctant to allow Jewish migration to Palestine?

Not sure this is the correct forum to ask this, but i'm currently reading 'Exodus' by Leon Uris, and i'm curious as to why the British were so reluctant in letting jewish people in Palestine. This ...
15
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1answer
992 views

What is this military patch with the silhouette of a pegasus on it?

I found this patch among my grandfather's things. I know it's a military patch of some sort because it was with his war memorabilia. He served in the European theater during WWII, if that helps at ...
15
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3answers
2k views

What caused the Iranian 1979 revolution to become Islamic?

How did an initially anti-Shah revolution become an Islamic revolution? Was it because of Khomenei's return to Iran such that he seized the Iranian revolution?
15
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2answers
360 views

How many different countries could a person alive today have lived in without leaving their hometown?

For example, a centenarian who has spent her entire life in Rijeka would have lived in five: The Austro-Hungarian Empire (until 1920) The Free State of Fiume (1920-1924) Italy (1924-1947) Yugoslavia ...
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3answers
550 views

How true is the statement “Soviet troops got into Berlin riding American trucks, walking in American boots and using American trains”?

In other words, how significant was American lend-lease in helping the Soviet front? Would the Soviets be suffering a lot more had lend-lease not happen, or was it not as significant as people make ...
15
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1answer
164 views

In which document was the exact course of the northern part of the German-Polish border decided?

While researching the answer to "How was Germany's border decided?", I didn't manage to find any documents which would precisely describe the borders between Germany and Poland between the points 53° ...
15
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2answers
233 views

How popular was Mozart in France before WWII and after it?

Another intriguing statement by Robert Paxton: I was surprised myself to learn that Mozart had been little played in France before 1940, and that his prominence since 1945 in the French ...
14
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4answers
651 views

From whom did Gandhi learn his protest technique of non-violence?

I know that Gandhi was involved in the civil rights movement in South Africa during he beginning of the 20th century, but was there a specific person, or group, that he learned how to protest through ...
14
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1answer
399 views

How do Friedman and Bernanke's explanations about the causes of the Great Depression compare?

I know that both Friedman and Bernanke wrote papers (or books, in Friedman's case) about the cause of the Great Depression. How do their points of view compare and contrast?
14
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3answers
582 views

In what ways did the rise of a true middle class in Europe during the late 19th century become apparent?

The late 19th and early 20th centuries were very transformative for Europe with the rise of a real middle class. Typically before this the middle class was more of a bourgeoisie and not the middle ...
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2answers
2k views

Why is Thailand considered an Axis power in WWII?

I read a Wikipedia article about military history of Thailand and it left me a taste of anti-Thai bias. It is known that Thailand in 1940 (after the fall of Paris and establishment of Vichy ...
13
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6answers
4k views

How did the US/South Vietnam lose the Vietnam war?

South Vietnam was helped by US. Even when the US was gone, they had a 1 million army. So why did they lose? Even without US support, South Vietnam had about the same manpower, higher technology, and ...
13
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5answers
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Can someone help explain this floor plan of a mid 20th century apartment?

I was watching 12 Angry Men, which was made in 1957; and they show this floor plan of an apartment: My main question is, what's the opening in the wall between the hallway and the main room? It ...
13
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4answers
9k views

Why did so many Italians emigrate to Argentina?

On 13th of March, 2013, archbishop of Buenos Aires, Jorge Mario Bergoglio, became new pope of Catholic Church. He was born and raised in Argentina with Italian origins. There are more than 24 ...
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6answers
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Did Hitler really support Subhash Chandra Bose's cause and did he do anything to help Bose?

Bose had come to realize that Gandhi's doctrine of non-violence was not doing much in forcing the British to retreat. He went to Germany to seek Hitler's assistance in India's struggle for freedom. ...
13
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3answers
572 views

What do I need to know about Syria's history to understand the 2011-2012 uprising?

Syria is in the news a lot lately due to the current uprising, but it's not a country that many people know much about. It can trace its history back to the origins of civilization, and as a result ...
13
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3answers
316 views

What were the factors that caused the world to move away from the Gold Standard in the 20th century?

For most of the world's history for thousands of years, gold was used as the medium of exchange for money. The world gradually moved off the gold standard in the 20th century. What were the factors ...
13
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1answer
227 views

What set Checkpoint Charlie apart from the other border checkpoints in Berlin during the Cold War?

How did "Checkpoint Charlie" become known as the border crossing between East and West Berlin? Out of the countless border checkpoints, what set Checkpoint Charlie apart from the rest for defectors?
13
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1answer
132 views

Gazan attitudes to Egyptian rule 1948-1967

Was Egyptian rule viewed favourably by the population? Were there uprisings? Another related question: were there travel restrictions of some form (i.e. could Gazans travel freely in Egypt)? UPDT: ...
12
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2answers
83k views

How many troops died on D-day?

How many troops (allied and axis) died at Normandy beach on June 6th, 1944? I've searched all over the internet, but can't find an accurate number.
12
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3answers
589 views

Why were there civil wars in Croatia and Bosnia, but not in Slovenia or Macedonia?

It seems that during the breakup of Yugoslavia there were civil wars during speakers of the (then officially) same language - Serbs, Croats and Bosniaks, but not, e.g., between Serbs and Slovenians. ...
12
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4answers
731 views

Is the steel pan the only acoustic musical instrument to be invented in the 20th century and used widely around the world?

I have seen claims that the steel pan (commonly called steel drum) was the only acoustic instrument developed in the 20th century. Is this true? There are related instruments (the Hang or hand pan) ...