Not exactly. They are not allowed to engage in law enforcement operations under the posse comitatus act. They are authorized to operate and keep the peace in times of insurrection. And if some armed force were to come onto American soil, they could certainly defend their nation.
The idea of “posse comitatus” only applies to members of the “regular” army and the air force. The entire Marine Corps, and everybody that counts as “special forces” are exempt.
The idea of “posse comitatus” only applies to members of the “regular” army and the air force. The entire Marine Corps, and everybody that counts as “special forces” are exempt.