How exactly did World War 2 start?

Which countries formed the allies during World War 2? What happened to Sally Buchanan Campbell Preston a figure described in Mary Chesnut's Civil War book? What was Pauline Cushman's life as a spy like? What prompted the US to enter into an all out war in Vietnam? What was Antietam civil war? What is the conflict and compromise of the Vietnam War? How do you gain ground on mud and blood 2? Why are they called Tommy's? At what battle did Sam Houston defeat Santa Anna's forces and win independence for Texas? What was operation overlord also known as? What three groups of people had the british enlisted to fight against the colonists? What types of bombs were there in world war 1? When was Army of Lovers created? What was the ww1 HQ dug out used for? What are the top five countries to which the most members of the us armed forces are deployed? What was the name of sir Tristan's shield? What was the purpose behind the US announcing a body count during the Vietnam war? Why was dover bombed in world war 2? How were the British involved in the civil war? What motives did knights have for supporting the crusades?