[Lucius Cornelius Sulla]

That would seem to indicate which country / countries was / were the conquered aggressor/s

I am afraid that, in general. there is no correlation between being the aggressor in a war and being the loser. Rather the contrary, in fact -- unless you think that might makes right. WWII is an exception.

[Michael81Dus]

World War One was the fault of all European major powers.

http://library.thinkquest.org/12367/

Maybe you want to do the online lesson:
http://www.schoolhistory.co.uk/lessons/wwi/objectives_wwi.html

Take your time, afterwards you´ll be able to explain the causes of WW1. It´s for 9 graders, but that shouldn´t be a problem for you. ;-)

The Treaty of Versailles is the start of the chain that led to World War Two. That´s common understanding of the world´s history - also taught in British schools (or Germans, for that matter).

http://www.schoolhistory.co.uk/year9links/versailles.shtml

[GretchenM]

I was aiming at Germany's culpability in the war, which happened to coincide, thank God, with her surrender at its terminus, a point which the Michael person seemed to want to get around (the culpability, that is).