The people of a free country are presumed to be armed, by virtue of the Second Amendment of the Constitution of the United States of America.
The formal branches of the military, the Army, Navy, Marine Corps, Air Force, and the new Space Force, do recruit formally, and people join up for various reasons of their own.
There are other branches, such as the National Guard, the Coast Guard, the Civil Air Patrol, and more recently the TSA, Homeland Security etc., etc., who also bear arms in a more or less “civilian” capacity, but still in the formal employ of the U.S. government, and to the exclusion of ordinary citizens’ Constitutional rights.
The necessity of war is not something imposed as such by the orders of higher-ranking military officials or by Congressional action but by militant enemies who are bent on destroying our lives and progressively depriving us of our liberty and property.
When we with a sound mind and conscience are willing to fight, we fight, and ask our Congressional Representatives for a formal declaration of war and the necessary funding to arm ourselves and organize ourselves in mortal combat against foreign and domestic enemies who have already made the conditions of our existence so untenable that we are willing to risk our own lives to wreak death and destruction on our enemies until the way is paved for freedom and right.