The German constitution explicitly prohibits starting wars: https://www.gesetze-im-internet.de/englisch_gg/englisch_gg.h...

Defense doesn't mean not to start a war. Think about how Vietnam justified their invasion of Cambodia in 1978, or how China started the war with Vietnam the following year, or how Turkey entered Syria, how Pakistan fought the Taliban recently, and of course what Russia did in Ukraine, 2014 and 2022.

Wars are messy and have always been. Military actions are to be decided by the governments. Those who have resources are more willingly to use it, west or east.

Germany was one of the least militarized countries after WWII. They were kind of scared of themselves.

Germany participated how there?

It is for the defense of the American national interests and friend nations:

- Iraq: 1) to expel Iraq from Kuwait, and 2) weapons (though this turned out to be mistaken) after the 9/11 attacks

- Iran: we don’t need another nuclear nation

- Syria: destroy terrorists (ISIS), enforce the red line on chemical weapons, and to protect US troops (when we attacked Iran-supported militias)

- Vietnam: to stop the spread of communism and protect neighboring nations