A flock of mocking-birds attacking a rattlesnake in a tree, which was threatening a nest.

Mockingbirds attacking a rattlesnake

A flock of mocking-birds attacking a rattlesnake in a tree, which was threatening a nest.

The distinction between rank and unit type doesn't seem to have been as precise as in a modern-day army, in which a soldier has a separate pay-grade, job description, and assigned unit.

Roman Soldiers

The distinction between rank and unit type doesn't seem to have been as precise as in a modern-day army,…