For questions about interactions between sovereign states.

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26
votes
6answers
58k views

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? ...
10
votes
3answers
959 views

When passports/border checks became widespread?

I was reading the Wikipedia on passports, and there were numerous important dates in passport history, but I didn't find any date when passports became widely used documents for travelling. I see ...
9
votes
1answer
797 views

Why did the Ming Dynasty Treasure Fleet Voyages end?

Have we come to know more reasons, on why the Treasure Fleet Voyages of the Ming Dynasty ceased, other than eunuch-to-civil power shift? Wikipedia says However, in 1433, the voyages ceased and ...
10
votes
3answers
1k views

Why was France given such a lenient peace after Napoleon was defeated?

For two decades revolutionary France had attacked and conquered many nations in Europe. Millions were killed. But when the allies finally defeated France, the peace was very lenient. France didn't ...
8
votes
4answers
600 views

Why did France make an alliance with the Kingdom of Sardinia-Piedmont in the 1850's?

It is clear why Cavour wanted the alliance, but what benefits would France have from allying itself to a relatively weak (as far as I know) kingdom?
13
votes
2answers
402 views

How did France worsen its relationship with Turkey?

Several years back Turkey barred some French companies to participate in one of its arms procurement tender. Turkey doesn't allow French military air-crafts or ships to pass its territorial space. ...
8
votes
4answers
2k views

Why and how were east Brandenburg, Pomerania and Silesia taken away from Germany after WW2?

These areas have always been German, in fact Pomerania and Brandenburg were both part of Prussia since the 1700's. Why did the Soviet Union do this, and how did the victorious powers justify taking ...
7
votes
4answers
4k views

How did Egypt become a protectorate of the British empire?

How did Egypt become a protectorate of the British empire in 1914? (Feel free to add more content to this question)