The 1st Corps was one of seven units of the Army of the Republic of Bosnia and Herzegovina established in 1992, in the early part of the Bosnian War.

The 1st Corps of the Army of the Republic of Bosnia and Herzegovina was solely established to defend Sarajevo and some part of the Sarajevo region.

The First Corps was responsible for the zone of Sarajevo during the war with the Bosnian Serb and Croat forces and its headquarters were established in Sarajevo.

The First Corps had the assignment of protecting the Sarajevo, Gorazde zone from the opponents.

In January 1995, all Corps operational groups were transformed into divisions and each division contained numerous brigades, further divided into battalions, detachments and specialized units.