Some causes of nations joining world war 1
- Assassination of Archduke Franz Ferdinand
- Military rivalry between powerful nations
- US: the Zimmermann Telegram and the sinking of the Lusitania
- Colonies: The wish that if they fought for for their European countries they could be free, and so they join the war, making it a World War effectively
hope this helps
Answer:
a trade route that connected Rome in the west to China in the east
The Abbasid dynasty fell to the Mongols and became part of the Mongol empire
