"(2) monitoring persons suspected of endangering national security" was something that the federal government did in <span>response to Cold War tensions after World War II and again in response to the September 11, 2001, terrorist attacks.</span>
That's why he went to war, to get resources and show Germany power but he also didn't believe in democracy which why he didn't ask for help from any other countries, instead he just took it.
Explanation: it’s “ a system that allows each branch of a government to amend or veto acts of another branch so as to prevent any one branch from exerting too much power”