Translation of "perfidia" into English

et Vitellius credidit de perfidia et fidem absolvit.

Vitellius gave them credit for perfidy, and acquitted them of the crime of loyalty.

victi, quod tum in morem verterat, non suam ignaviam, sed perfidiam legati culpabant.

The vanquished troops, following what had become a regular practice, laid the blame not on their own cowardice, but on supposed treachery in the legate.