Wing commander (Wg Cdr or W/C) is a senior officer rank used by some air forces, with origins from the Royal Air Force. The rank is used by air forces of many countries that have historical British influence.
Wing commander is immediately senior to squadron leader and immediately below group captain. It is usually equivalent to the rank of commander in the navy and the rank of lieutenant colonel in other services.
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Lieutenant colonel (Lt Col) is a rank in the British Army and Royal Marines which is also used in many other Commonwealth countries. The rank is superior to major, and subordinate to colonel. The comparable Royal Navy rank is commander, and the comparable rank in the Royal Air Force and many other Commonwealth air forces is wing commander.
The rank insignia in the British Army and Royal Marines, as well as many Commonwealth countries, is a crown above a four-pointed "Bath" star, also colloquially referred to as a "pip". The crown has varied in the past with different monarchs; the current one being the Tudor Crown. Most other Commonwealth countries use the same insignia, or with the state emblem replacing the crown.
Group captain (Gp Capt or G/C) is a senior officer rank used by some air forces, with origins from the Royal Air Force. The rank is used by air forces of many countries that have historical British influence.
Group captain is immediately senior to wing commander and immediately below air commodore. It is equivalent to the rank of captain in the navy and of colonel in other services.
Squadron leader (Sqn Ldr or S/L) is a senior officer rank used by some air forces, with origins from the Royal Air Force. The rank is used by air forces of many countries that have historical British influence.
Squadron leader is immediately senior to flight lieutenant and immediately below wing commander. It is usually equivalent to the rank of lieutenant commander in the navy and of the rank of major in other services.