A Military Band is a wind and percussion ensemble, not necessarily belonging to the armed forces. Civilian wind and percussion bands are today usually called  'concert bands' if they perform indoors, or 'marching bands' , because they are formed of instruments that can be played whilst being carried on the march.. The instruments in the brass section usually include trumpets, cornets, trombones, flugelhorns, and euphoniums. The woodwinds include flutes, clarinets and saxophones, but neither oboes nor bassoons.

The photo shows the Royal Australian Air Force Band on the march. Military bands such as this one have a very high standard of musicianship, and they are not limited to playing marches. They have a versatile repertoire ranging from arrangements of romantic orchestral compositions, to big band arrangements of show tunes and popular songs. 

Bugles or cornets are generally used instead of trumpets. The other brass instruments (trombones and French Horns) are augmented by woodwinds, namely flutes, clarinets, and all types of saxophones, but excluding oboes, which cannot compete in loudness with the brass. The clarinets often play the parts assigned to violins in orchestral music. The marching percussion section includes side-drums, a big base drum, and cymbals.