What were the causes of world war one

Treaties and Alliances: In the years preceding WWI many European nations formed alliances that would pull the other into war if one was attacked.

Imperialism: Increasing competition and desire for larger empires led to an increase in hostilities that helped push Europe into war.

Militarism: In the years before WWI began many European nations began stockpiling weapons and building new warships in an arms race.

Nationalism: Much of the origin of the war was based on the desire of the Slavic peoples in Bosnia and Herzegovina to no longer be part of Austria Hungary but instead be part of Serbia. The nationalism of the various countries throughout Europe contributed not only to the beginning but the extension of the war in Europe

la segunda guerra mundial comenzó el 1 de septiembre de 1939 y terminó el 2 de septiembre de 1945. ¡espero que esto ayude!

the answer is a) the proclamation of 1763.