'Vos telis hostium estis indefensi, inulti? quid igitur arma habetis, aut quid ultro bellum intulistis, in otio tumultuosi, in bello segnes? quid hic… - Titus Livius

Are you going to offer yourselves here to the weapons of the enemy, undefended, unavenged? Why is it then you have arms? And why have you undertaken an offensive war? You who are ever turbulent in peace, and laggard in war. What hopes have you in standing here? Do you expect that some god will protect you and bear you hence? A way is to be made with the sword. Come you, who wish to behold your homes, your parents, your wives, and your children; follow me in the way in which you shall see me lead you on. It is not a wall or rampart that blocks your path, but armed men like yourselves. Their equals in courage, you are their superiors by force of necessity, which is the last and greatest weapon.

No crime can ever be defended on rational grounds.

There are laws for peace as well as war.