Charles Sumner,
Charles Sumner: his complete works…
“ I say it is a War Power; and when your country is actually in war, whether it be a war of invasion or a war of insurrection, Congress has power to carry on the war, and must carry it on according to the Laws of War; and by the Laws of War an invaded country has all its laws and municipal institutions swept by the board, and Martial Law takes the place of them. ”
