Were men forced into conscription in UK and US during WW2? Was that the case in Nazi Germany?

by Ignas1452
Rittermeister

May I ask you to clarify just what you mean? Conscription by its very definition involves compulsion; it's the state essentially saying "report for military service or we'll throw you in prison (barring a few exceptions)."

If you're asking if the United States, United Kingdom, and Nazi Germany used conscription, then the answer is a resounding yes. The vast majority of all their militaries was composed of conscripts.