asked 7.6k views
3 votes
Which was a cause of world war 1

,the invention of an ariplane,
russias race to industrialize,
the second industrial revolution,
europes system of millitary alliences

2 Answers

3 votes
i guess its the last one 
answered
User KJF
by
9.1k points
2 votes
Europe's System of Military Alliances
answered
User Nether
by
8.3k points
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