Question

the enemy have defeated our army change into passive voice

Answer 1

our army has been defeated by the enemy

Answer 2

HELLO DEAR FRIEND

$\large \bf \mathcal \red{Active \: \: voice = > }$The enemy have defeated our army .

$\large \bf \mathcal \red{ Passive \: \: voice = > }$Our army have been defeated by the enemy.

HOPE IT HELPS YOU DEAR FRIEND

THANKS