For questions spanning a significant proportion of the 20th century. Questions focused on the latter decades should consider using the contemporary-histroy tag. Individual tags exist for specific decades.

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122
votes
28answers
69k views

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 ...
11
votes
4answers
796 views

Why was the Irish War of Independence in 1918 successful when other revolts failed?

In a nutshell, what events, occurrences, or mishaps took place that allowed the Irish to win the war of Independence over what could arguably be the most powerful nation of the time, when they were ...
39
votes
11answers
13k views

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?
19
votes
3answers
2k 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 ...
16
votes
1answer
447 views

Did President Kennedy really cut 100,000 government jobs during his presidency?

In Michel Crozier's book, La crise de l'intelligence, he states that during John F. Kennedy's presidency about 100,000 government jobs were terminated. Is this figure accurate? Where can I find any ...
8
votes
5answers
6k views

Where was the pre-war (ww2) border between Poland and Germany?

I am interested in mapping the pre-war (WWII) border between Poland and Germany. Is there any data available in a public resource? Can anyone describe waypoints along the border in terms of modern ...
76
votes
13answers
24k views

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 ...
15
votes
2answers
173k 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.
33
votes
8answers
8k views

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 ...
12
votes
1answer
3k views

German Government branches during World War 2

During World War 2, what government branches, if any, existed in Germany? I've always heard about the Third Reich and Hitler, but I never heard about the rest of the government.
16
votes
1answer
447 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?
19
votes
1answer
332 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 ...
14
votes
3answers
1k views

What factors related to the Eastern Crisis contributed to the outbreak of World War 1?

What factors related to the Eastern Crisis contributed to the outbreak of World War 1? The Eastern Crisis pertains to problems posed by the decay of the Ottoman Empire. Primary among these problems ...