Arms discourage and keep the invader and plunderer in awe, and preserve order in the world as well as property... Horrid mischief would ensue were the law-abiding deprived of the use of them.
— Thomas Paine

Let the poor man count as his enemy, and his worst enemy, every invader of the right of free discussion.
Gerrit Smith invader quote

They are few in the midst of an overwhelming mass of brute force, and their submission is wisdom; but for a nation like England to submit to be robbed by any invader who chooses to visit her shores seemed to me to be nonsense.
— George Combe

I insist that there is nothing sacred in the life of an invader, and there is no valid principle of human society that forbids the invaded to protect themselves in whatever way they can.
— Benjamin Tucker

The cost of justice can be justly paid only by the invader.
— Benjamin Tucker