The officers threatened to take reprisals if the lives of their men were __________ by the conquered natives.
The officers threatened to take reprisals if the lives of their men were __________ by the conquered natives.
Explanation
The officers threatened to take reprisals if the lives of their men were endangered by the conquered natives.
افسران نے دھمکی دی کہ اگر ان کے جوانوں کی جان کو مفتوحہ مقامی باشندوں سے خطرہ لاحق ہوا تو وہ انتقامی کارروائی کریں گے۔
"endangered (خطرے سے دوچار)" is best to keep the meaning of the original sentence.