I Corps Band or America's First Corps Band (officially referred to as the 56th Army Band) is an American military band maintained by the United States Army and is attached to the Army's I Corps in United States Army Forces Command.

These ensembles include: Outside ceremonial performances, the band also performs throughout the Tacoma community, which frequently include K-12 schools as well as community concerts and parades.

A member of the band often performs at the regimental ball of the Military Police Corps in Tacoma, Washington.

[3] Being a music entity, the jazz band of the I Corps Band has performed on multiple media networks such as KNKX, which is the National Public Radio's jazz-based radio format for the Seattle metropolitan area.

[6] In the summer of 2016, it performed at a memorial service in Enoggera, Queensland, Australia as part of the Talisman Saber exercise.