What does the brass mean, exactly, in military context

In books by many different authors I encountered phrases like this: He curses the brass for not caring whether he lives or dies. From context, it seemed to me that it meant high-rank officers

1 ROTC Brass Rank Collar Enlisted Torch Pin, U.S. Army

South Carolina Department of Veterans' Affairs

Officer (armed forces) - Wikipedia

What is the meaning of The top military brass listened sympathetically? - Question about English (US)

The Ultimate Guide to U.S. Military Pins and Ribbons and What They Mea

Top Brass

The Sounding of Trumpets: Ritual, Signal, Warfare, and the Hunt in the Music of Early Brass Instruments : Early Music Seattle

Sergt. Louis Sageis, a Belgian-born typist or interpreter, is pictured here. He served in the 7th Army Corps Headquarters Co. in Wittlich, Germany during World War One. Note #1 reveals the absence

TRADITIONS - Army West Point

Dog Tag History: How the Tradition & Nickname Started > U.S. Department of Defense > Blog