Air chief marshal (Air Chf Mshl or ACM) is a very senior air force rank which originated in and continues to be used by the Royal Air Force (RAF). The rank is also used by the air forces of many countries which have historical British influence and it is sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure. Air chief marshals are sometimes generically considered to be air marshals.

Seniority

Air chief marshal is a four-starair officer rank and has a NATO ranking code of OF-9. An air chief marshal is equivalent to a "full" admiral or a "full" general in the United Kingdom, the United States and elsewhere.

The rank of air chief marshal is immediately senior to the rank of air marshal but subordinate to marshal of the Royal Air Force (or other national equivalent - see marshal of the air force). Although no serving RAF officer has been promoted to marshal of the Royal Air Force since the British defence cuts of the 1990s, British air chief marshals are not the most senior officers in the RAF as several officers continue to retain the RAF's highest rank. Additionally, Lord Stirrup was granted an honorary promotion to marshal of the Royal Air Force in 2014. The marshals are still to be found on the RAF's active list even though they have for all practical purposes retired. A similar situation also exists in the Indian Air Force as the honorary promotion of Arjan Singh to marshal of the Indian Air Force in 2002 resulted in Indian air chief marshals no longer being the most senior IAF officers.

Air chief marshal is the highest active rank of the Royal Australian Air Force and was created as a direct equivalent of the British Royal Air Force rank of air chief marshal. It is also considered a four-star rank. The only time the rank is held is when the Chief of the Defence Force is an Air Force officer.

Air chief marshal is a higher rank than air marshal and is a lower rank than Marshal of the Royal Australian Air Force, which has only ever been awarded as an honorary rank. Air chief marshal is a direct equivalent of admiral in the Royal Australian Navy and general in the Australian Army.

Insignia

The insignia worn on the uniform is three light blue bands (each on a slightly wider black band) over a light blue band on a black broad band.

Australian air chief marshals may also fly an officer distinguishing flag. For air chief marshals this comprises five horizontal stripes which from top to bottom are coloured: dark blue, light blue, red (double thickness), light blue and dark blue with four stars imposed in a line on the red stripe.

The ranks chief marshal of a branch (Russian: главный маршал рода войск, glavni marshal roda voisk) and marshal of the branch (маршал рода войск, marshal roda voisk) were senior military ranks of the Soviet Armed Forces. Immediately above the rank "marshal of a branch" is the rank "chief marshal of a branch". Both ranks are immediately above the rank "colonel general" and equal to Soviet general of the army.

Establishment in 1943

The ranks of marshal of the aviation, artillery and armoured troops branches were established on February 4, 1943, with a large, approximately 50mm wide, shoulder board star (the same star as the at-the-time equivalent rank of marshal of the Soviet Union's shoulder board star). When the rank of chief marshal was established on October 27, 1943, the size of the shoulder board's stars for marshals was made about 10mm smaller establishing the superiority of the marshal of the Soviet Union insignia. Also, on October 27, 1943, the ranks of marshal of the branches engineer troops and signals were established. On the uniform tie, marshals wore the marshal's star of the 2nd level.