Rear admiral is a senior naval flag officer rank, equivalent to a major general or divisional general and air vice marshal and above that of a commodore and captain, but below that of a vice admiral.
Brigadier general or brigade general is a military rank used in many countries. The rank is usually above a colonel, and below a major general or divisional general. When appointed to a field command, a brigadier general is typically in command of a brigade consisting of around 4,000 troops.
Listed in the table below are the insignia—emblems of authority—of the British Army. Badges for field officers were introduced in 1810 and the insignia was moved to the epaulettes in 1880. On ceremonial or parade uniforms these ranks continue to be worn on the epaulettes, either as cloth slides or as metal clips, although on the modern 'working dress' they are usually worn as a cloth slide on the chest. Although these insignia apply across the British Army there is variation in the precise design and colours used and it can take some time to become familiar with them all.
A flag officer is a commissioned officer in a nation's armed forces senior enough to be entitled to fly a flag to mark the position from which the officer exercises command.
General is the highest rank achievable by serving officers of the British Army. The rank can also be held by Royal Marines officers in tri-service posts, for example, Generals Sir Gordon Messenger and Gwyn Jenkins, former and current Vice-Chief of the Defence Staff. It ranks above lieutenant-general and, in the Army, is subordinate to the rank of field marshal, which is now only awarded as an honorary rank. The rank of general has a NATO-code of OF-9, and is a four-star rank. It is equivalent to a full admiral in the Royal Navy or an air chief marshal in the Royal Air Force.
Lieutenant-general is a Canadian Forces rank used by commissioned officers of the Canadian Army or Royal Canadian Air Force. Vice-admiral is the equivalent rank in the Royal Canadian Navy.
Lieutenant general, formerly more commonly lieutenant-general, is a senior rank in the British Army and the Royal Marines. It is the equivalent of a multinational three-star rank; some British lieutenant generals sometimes wear three-star insignia, in addition to their standard insignia, when on multinational operations.
The following tables present the ranks and insignia of the Sri Lanka Navy. These ranks are similar to Royal Naval officer ranks and the ratings ranks. Sri Lanka does have an Admiral rank, but it is usually only awarded to the Chief of Defence Staff (CDS) or as an honorary rank; Admiral Wasantha Karannagoda was the only Sri Lankan naval officer to hold a full admiral rank while in active service.
Brigadier (Brig) is a senior rank in the British Army and the Royal Marines. Brigadier is the superior rank to colonel, and subordinate to major-general. It corresponds to the rank of brigadier general in many other nations.
General is the second-highest rank, and the highest active rank, of the Australian Army and was created as a direct equivalent of the British military rank of general; it is also considered a four-star rank.
Admiral is the highest active rank of the Royal Australian Navy and was created as a direct equivalent of the British naval rank of admiral. It is a four-star rank. Since 1968, generally the only time the rank is held is when the Chief of the Defence Force is a navy officer.
Major general is a senior rank of the Australian Army, and was created as a direct equivalent of the British military rank of major general. It is the third-highest active rank of the Australian Army, and is considered to be equivalent to a two-star rank. A major general commands a division or the equivalent.
General is a military rank used by the Canadian Army and Royal Canadian Air Force typically held by the officer who is serving as the chief of the Defence Staff – the senior uniformed officer of the Canadian Forces – if they belong to those elements. Admiral is the equivalent rank in the Royal Canadian Navy.
Lieutenant general is the second-highest rank of the Sri Lanka Army and generally it is the highest active rank as the Sri Lanka army do not have any appointment in the rank of full general but in the case of the appointment of Chief of Defence Staff, the rank of full general is given. It was created as a direct equivalent of the British military rank of lieutenant general, and is considered a three-star rank.
Major General is a senior rank in the Sri Lanka Army, and was created as a direct equivalent of the British military rank of major general. It is the second-highest active rank of the Sri Lanka Army while the Lieutenant General is the highest, and is considered to be equivalent to a two-star rank. A major general commands a division or the equivalent or performs staff duties in army headquarters.
General is a four-star general officer rank in the Indian Army. It is the highest active rank in the Indian Army. General ranks above the three-star rank of lieutenant general and below the five-star rank of field marshal, which is largely a war-time or ceremonial rank.
Lieutenant general is a three-star general officer rank in the Indian Army. It is the second-highest active rank in the Indian Army. Lieutenant generals rank above the two-star rank of Major General and below the four-star rank of General, which is held by the Chief of the Army Staff.
General is a four Star general officer rank in the Bangladesh Army. It is the highest achieved rank in the Bangladesh Army. General ranks above the Three Star rank of Lieutenant general. The rank is denoted as a full-fledged General to extricate subordinate officers - Lieutenant general and Major general which are also general officers.
Major general is a two-star general officer rank in the Indian Army. It is the third-highest active rank in the Indian Army. A major general ranks above the one-star rank of brigadier and below the three-star rank of lieutenant general.
General is the highest rank achievable by serving officers of the Nigerian Army. It ranks above lieutenant-general and is subordinate to the rank of field marshal, which is only awarded as an honorary rank to the incumbent president of Nigeria in his capacity as the commander-in-chief of the Armed Forces of Nigeria. The rank of general has a NATO-code of OF-9, and is a four-star rank. It is equivalent to a full admiral in the Nigerian Navy or an air chief marshal in the Nigerian Air Force.
Bangladesh 
Bangladesh Army 
