Stephen J. Field, Personal reminiscences of early days in California…
“ The Constitution prohibits any treaty, alliance, or confederation by one State with another, and it declares on its face that it is the supreme law of the land. The Confederate government, therefore, could only be treated by the United States as the military representative of the insurrection against their authority. Belligerent rights were accorded to its armed forces in the conduct of the war, and they thus had the standing and rights of parties engaged in lawful warfare. ”
