An armilla was an armband awarded as a military decoration to soldiers of ancient Rome for conspicuous gallantry. Legionary (citizen) soldiers and non-commissioned officers below the rank of centurion were eligible for this award, but non-citizen soldiers were not. Unlike legionaries, auxiliary common soldiers did not receive individual decorations, though auxiliary officers did. However, a whole auxiliary regiment could be honoured by a title as an equivalent award, which in this case would be armillata, or be granted Roman citizenship en masse as a reward. This entitled an auxiliary regiment to add the appellation civium Romanorum to its list of honours.