You cannot clap with one hand alone.
A little bait catches a large fish.
Sir: It gives me pleasure to report to you the fine bearing and soldierly conduct of Captain Wilson and his men whilst absent on special duty. Though their duties were more arduous than those of others, they were always prompt and ready for performance of all they were called upon to do. As a body they would be a credit to any organization, and I will be glad to be associated with them on duty at any time.