en_tn/mrk/15/16.md

the barracks

This is the place where the soldiers stayed.

cohort

"large amount" or "many"

They put a purple robe on Jesus

This was an act of mockery. Purple was a color attributed to royalty and by clothing him this way they were mocking his title, "King of the Jews."

They began to salute him and said, "Hail, King of the Jews!"

Again, the soldiers were mocking Jesus because they did not believe that he was the King of the Jews. (See: rc://en/ta/man/translate/figs-irony)