When did Michael Collins go to prison and why?

How were the Greeks able to get enough food to feed their population? When did high school football start? Why did English settlers want to join the colonies? What was the rationale behind the National Industrial Recovery Act? How Spain profited from these voyages? Why did the US drop two bombs on Japan? How many years has it been since the Victorians were around? What was the weather in Han Dynasty? Why did the soldiers tell jokes about the Vietnam war and about killing? What player has homered in the most ballparks? What were the fielding stats for baseball player Jeff Abbott playing at outfield for the Chicago White Sox in 1999? What are the three slave amendments? Who in the Pan-African movement organized the first Pan-African conference in 1900? What were the views of the delegates to the convention on democracy and equality according to Beard? What was the American reaction to President Roosevelt's securing of the canal zone? How did the Magna Carta affect government in the colonies? Is it lawful to fight on the sabbath? How tall was Napoleon Bonapart? What does Fanny Wright have to do with the women suffrage movement? How far was eratosthenes measurement off from todays?

When did Michael Collins go to prison and why?