The Survivability Onion diagram illustrating layers of defense for combat vehicles.

A colorful concentric circle diagram titled 'The Survivability Onion' showing layers of defense for a tank, from 'Don't be there' to 'Don't be killed'.

The Survivability Onion Created by Chris Moore Don't be there Don't be identified Don't be acquired Don't be engaged Don't be hit Don't be penetrated Don't be killed