Four empires collapsed: the Russian Empire in 1917, the German and the Austro-Hungarian in 1918
Answer:
Social and ethnic structures caused discontent. Spanish born peninsulares, members of the highest social class, dominated political and social life.
Explanation:
hope it helps
Navajo Code, during the war the japanses were able to use many and decode many codes, but the Navajo code was never able to be solved.. the marines used this code seeing as it was the language of the Navajo indians
