Why is illegal for CS gas (tear gas) to be used in warfare but countries can use it on their domestic population?

Question

Title.

In: 4

Answer 1

Although people like to meme them, warcrimes are different than crimes against humanity. There are quite a few war crimes that are not crimes in domestic contexts simply because warfare and agreements between how nations and their soldiers should treat each other do not have the same requirements or considerations, or negotiating power, as domestic issues of how a government treats it’s citizens.