As Israel marched around Jericho, what did Joshua order the people to do until his signal?

Answer: Make no sound or battle cry

Joshua said, "Do not give a battle cry or let your voice be heard... until the day I tell you to shout. Then you are to shout!"

“But Joshua had commanded the people: “Do not give a battle cry or let your voice be heard; do not let one word come out of your mouth until the day I tell you to shout. Then you are to shout!””— Joshua 6:10 (BSB)