-1
votes
2answers
88 views

Why did the assasination of Franz Ferdinand trigger WW1? [on hold]

I understand that there were also other reasons other than the assassination, but this is widely considered the trigger for WW1. Why? And why did the whole world get involved with this one ...
7
votes
3answers
2k views

Was the Zimmerman Telegram a ruse on the US or a way of Germany to incite Mexico to declare war on the US?

Prior to America's entry into WWI the Zimmerman Telegram was one incident that helped push America to declare war against Germany and join the Allies, while Mexico never fought against the US was this ...