It's called a militia and it's a right guaranteed in the 2nd Amendment of the US Constitution.
We all have the right to form militias.
FUCK UKRAINE
A pResident, especially a senile one, is only as good as his advisors. Look at Biden's cabinet for the answer to WHY.
Any group of American citizens can form a militia, sending them overseas to act as mercinaries will require government approval. Direct your concerns to the government. The states' National Guards are state militias. The US government calls them the Army National Guard and sends them all over the world as global police for the ZOG MIC.