Question

he served his country change into voice

Answer 1

$<marquee>$Heya!!!

Answer to your question:

♡His country was served by him.

Hope it helps ^_^

Answer 2

Passive voice : His country was served by him.

Explanation : In Passive voice, We don't change the tense and the meaning, Object and Subject interchange their positions.

In the above, He is the subject in the active voice which becomes the object in the passive voice. His country is the object in the active voice which becomes the subject in passive voice.