The primary purpose of protocol is to make formalities run smoothly -- conference, ceremony, or social. And social functions for the military have an official aspect; they directly affect official obligations. The correctness, and success of formal funtions for visiting dignitaries reflect favorably upon the command.     

Excerpt
"The United States flag is always dispayed on the right (flag's right)in a row of flags of equal height, either carried, or stationary."