Answer:
One of the federal governments' powers are the power to declare war.
Explanation:
A federal government has the ability to declare war on any country at any time, without the approval many other governments rely on. The decision to do so, however, relies on the executive group of people at the head of the government, like the President, Vice-President, and the cabinet.
1-Germany wanted to have an empire to match other Europeans
2-the alliance system started a chain reaction of countries joining and Germany also wanted to show off there new army to the world(militarianisn)