I. Ethnic units - romanized and barbarian

II. Nationes not numeri

III. The example of the Mauri

1. Mauri as regular ethnic units

2. Mauri as elite units - the literary record

3. Mauri as elite units - the epigraphic record

IV. The terms equites and vexillatio

V. Ethnic units in the frontier army. Their new status

VI. Ethnic units in the field army. Equites Dalmatae

VII. Ethnic units in the guard. Caracalla's leones and protectores

VIII. The barbarization of the army

I. Literature on the ethnic units

II. Literature on the third-century field army