Private Colin Idaho was a MACO soldier during the Earth-Romulan War.

In 2155, Colin and his mother Charis were interviewed by Gannet Brooks.

In 2156, Idaho took part in the MACO landings on Berengaria VII during the Second Battle of Berengaria. During the battle, Idaho was saved by Corporal Selma Guitierrez and the two conversed. (ENT novel: Beneath the Raptor's Wing)