The separation of powers was the first step to limiting power for one branch. The US built up their government based on the British, in which they had their version of Parliament, called Congress, the Federal Judge, or supreme court judge (as well as others, but we are focusing on the supreme court), as well as the executive branch, which is the President.
The next step was "checks and balances", which ensured that no one branch can be too powerful. The US president can veto Congress's legislation, Congress can override the veto, they can also impeach the president. The Supreme Court can rule laws unconstitutional, and change the laws based on what they think is constitutional.
hope this helps
Well, I'm not sure which war you're referencing. But, if it's WWI, they did it through war bonds and taxes. Mostly war bonds.
In 1939, France and Great Britain declared war on Germany as a direct result of Germany invading Poland. Known as September Campaign in Poland and Poland Campaign in Germany, the invasion happened on September 1, 1939 which was followed by the Soviet Union invading the Poland on September 17, 1939. After failing to comply to Sir Henderson's (Great Britain's ambassador to Germany) ultimatum to cease the invasion, the Great Britain declared war on Germany with France following.
George H. W. Bush was the sitting president at the time.