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

What is meant by 'military brass' in a military context? - Quora

A List of The U.S. Military Ranks in Order

Regiments of the Civil War American Battlefield Trust

Fanfare trumpet - Wikipedia

Military Tactics

The National WWII Museum Opens New Special Exhibit SOLDIER, ARTIST: Trench Art in World War II, The National WWII Museum

Armed force, Definition, Examples, & History

What is meant by 'military brass' in a military context? - Quora

Armed force, Definition, Examples, & History