"Every Communist must grasp the truth; "Political power grows out of the barrel of a gun." ."
A famous quote, the preamble usually left off, for obvious reasons. He also said:
Once you have shot your way into the presidential palace, the first thing to do is to sandbag the windows, and disarm the peasants.
Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party.
"Problems of War and Strategy" (November 6, 1938), Selected Works, Vol. II, p. 224.