Question

also meant using armed forces as tools for negotiating with other countries. the fourth cause was the alliance system. some countries in europe had made treaties promising to defend each other. these mutual - defense treaties placed european countries in two main groups. the allies were made up of france, britain, and russia. the central powers were made up of germany, austria - hungary, and the ottoman empire. for a while, some european leaders thought the alliance created a balance of power. in other words, they believed the alliances gave the opposing sides equal strength. they hoped that this would keep a single nation from attacking another, which would lead to war. they would soon be proved wrong. 1. name two causes of world war i.

Explanation:

The text mentions the alliance system as a cause. Also, the use of armed forces as negotiation tools (implied as a cause).

Answer:

Alliance system and using armed forces as negotiation tools.