Not only do ants send their old women to war (humans send their young men), they also enslave the strong (humans enslave the weak):

Ants were observed actively choosing to attack larger, better defended colonies over smaller, weaker ones.

Scientists suggest that the intelligent ants identify strong defences as a sign of a strong population.

By conducting fewer raids on strongly defended targets, the slave-making ants actually limit the risks and come away with the most pupae to enslave.

One day the strong ants will inherit the earth.