Rear admiral is a flag officer rank used by English-speaking navies. In most European navies, the equivalent rank is called counter admiral.
Field marshal is the most senior military rank, senior to the general officer ranks. Usually, it is the highest rank in an army, and as such, few persons are ever appointed to it. It is considered as a five-star rank (OF-10) in modern-day armed forces in many countries. Promotion to the rank of field marshal in many countries historically required extraordinary military achievement by a general. However, the rank has also been used as a divisional command rank and also as a brigade command rank. Examples of the different uses of the rank include Afghanistan, Austria-Hungary, Pakistan, Prussia/Germany, India and Sri Lanka for an extraordinary achievement; Spain and Mexico for a divisional command ; and France, Portugal and Brazil for a brigade command.
Brigadier is a military rank, the seniority of which depends on the country. In some countries, it is a senior rank above colonel, equivalent to a brigadier general or commodore, typically commanding a brigade of several thousand soldiers. In other countries, it is a non-commissioned rank.
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.
The military ranks of Finland are the military insignia used by the Finnish Defence Forces. The ranks incorporate features from the Swedish, German, and Russian armed forces. In addition, the system has some typically Finnish characteristics that are mostly due to the personnel structure of the Finnish Defence Forces. The ranks have official names in Finnish and Swedish languages and official English translations. The Swedish forms are used in all Swedish-language communications in Finland, e.g. in Swedish-speaking units of the Finnish Defence Force. The system of ranks in the Swedish Armed Forces is slightly different.
General is the highest rank of the German Army and German Air Force. As a four-star rank it is the equivalent to the rank of admiral in the German Navy.
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.
Australian Army officers receive a commission from the Governor-General of Australia, who is also the Commander-in-Chief of the Australian Defence Force. The commission is signed by both the Governor-General and the Minister of Defence. Rank insignia for commissioned officers is identical to that of the British Army, with the addition of a band containing the word "Australia" beneath the insignia.
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.
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.
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 a senior rank in the Bangladesh Army. It is the second-highest active rank of the Bangladesh Army and was created as a direct equivalent of the British military rank of lieutenant general. It is also considered a 3 star rank. Till 2007, it was the highest rank in the Bangladesh Armed Forces as all chiefs of army staff held this rank and navy and air chiefs were of two-star ranks.
Major General is a general officer 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.
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 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 
