What is the meaning of on front and soit rear?

The phrase "on front and soit rear" is a military term used to refer to the front and rear ranks of a formation. The term "on front" refers to the front rank, which is the first line of soldiers in a formation. The term "soit rear" refers to the rear rank, which is the last line of soldiers in a formation. The phrase is often used to give commands to soldiers, such as "on front, prepare to advance!" or "soit rear, cover the flanks!"