The Colossus class first saw combat during the Korean War.
Following the invasion of South Korea by North Korea on 25 June, ships of the British Far East Fleet that were operating in Japanese waters, including the carrier Triumph, were placed under the United States Far East Commander, to operate in retaliation to the invasion under the instructions of the United Nations Security Council.
The first carrier attack began on 3 July 1950, with aircraft from Triumph and United States carrier USS Valley Forge performing air strikes on North Korean airfields.

Between them, the Colossus-class carriers Triumph, Theseus, Glory, and Ocean, along with the Majestic-class HMAS Sydney, maintained a constant British aircraft carrier presence for the duration of the Korean War.
The Light Fleets were cheaper to operate than the armoured fleet carriers while providing a similar sized air group, but during the war proved to be slower, less comfortable, and more prone to wear-and-tear than other RN carriers.
Financial and manpower restrictions meant that only one Light Fleet could be deployed to Korea at a time.
Warrior also contributed to the Korean War effort by transporting replacement aircraft from the United Kingdom to British bases throughout the Far East region, which were then drawn upon by the active carriers.

Following the end of the Korean War, Warrior and Sydney returned to Korean waters on separate deployments, to ensure that the armistice was enforced and hostilities did not re-ignite.
The Colossus class first saw combat during the Korean War. Following the invasion of South Korea by North Korea on 25 June, ships of the British Far East Fleet that were operating in Japanese waters, including the carrier Triumph, were placed under the United States Far East Commander, to operate in retaliation to the invasion under the instructions of the United Nations Security Council. The first carrier attack began on 3 July 1950, with aircraft from Triumph and United States carrier USS Valley Forge performing air strikes on North Korean airfields.
Between them, the Colossus-class carriers Triumph, Theseus, Glory, and Ocean, along with the Majestic-class HMAS Sydney, maintained a constant British aircraft carrier presence for the duration of the Korean War. The Light Fleets were cheaper to operate than the armoured fleet carriers while providing a similar sized air group, but during the war proved to be slower, less comfortable, and more prone to wear-and-tear than other RN carriers. Financial and manpower restrictions meant that only one Light Fleet could be deployed to Korea at a time. Warrior also contributed to the Korean War effort by transporting replacement aircraft from the United Kingdom to British bases throughout the Far East region, which were then drawn upon by the active carriers.
Following the end of the Korean War, Warrior and Sydney returned to Korean waters on separate deployments, to ensure that the armistice was enforced and hostilities did not re-ignite.
1942 Design Light Fleet Carrier