Sergeant is a rank in use by the armed forces of many countries. It is also a police rank in some police services. The alternative spelling, serjeant, is used in The Rifles and other units that draw their heritage from the British light infantry. Its origin is the Latin serviens, 'one who serves', through the French term sergeant.
Sergeant major is a senior non-commissioned rank or appointment in many militaries around the world.
First lieutenant is a commissioned officer military rank in many armed forces; in some forces, it is an appointment.
Rank insignia in the French Army are worn on the sleeve or on shoulder marks of uniforms, and range up to the highest rank of Marshal of France, a state honour denoted with a seven-star insignia that was last conferred posthumously on Marie Pierre Koenig in 1984.
Before Unification as the Canadian Armed Forces in 1968, the Canadian military had three distinct services: the Royal Canadian Navy, the Royal Canadian Air Force, and the Canadian Army. All three services had a Regular (full-time) component and a reserve (part-time) component. The rank structure for these services were based on the services of the British military, the Royal Navy, the Royal Air Force, and the British Army. The change to a "Canadian" rank structure meant that many of the traditional (British) rank titles and insignia were removed or changed.
The Indonesian National Armed Forces (TNI) uses a simplified ranking system for the three branches of Indonesian Army, Indonesian Navy and Indonesian Air Force. Most of the ranks are similar with differences for the rank titles of the high-ranking officers. Exception exists, however, in the ranks of the service members of the Indonesian Marine Corps. While Indonesian Marine Corps is a branch of the Navy, the rank titles of the Marine Corps are the same as those of the Army, but it still uses the Navy's style insignia.
Second sergeant is typically a non-commissioned officer rank, used in many countries.
Third sergeant is typically a non-commissioned officer rank, used in some countries.
Captain is the name most often given in English-speaking navies to the rank corresponding to command of the largest ships. The rank is equal to the army rank of colonel and air force rank of group captain.
Corvette lieutenant is a rank in some navies, especially those of Spain and Latin America, roughly equivalent to a Royal Navy acting sub-lieutenant or a US Navy ensign.
Ship-of-the-line lieutenant is a naval officer rank, used in a number of countries. The name derives from the name of the largest class of warship, the ship of the line, as opposed to smaller types of warship.
Corvette captain is a rank in many navies which theoretically corresponds to command of a corvette. The equivalent rank in the United Kingdom, Commonwealth, and United States is lieutenant commander. The Royal Canadian Navy uses bilingual ranks, with capitaine de corvette being the French equivalent of lieutenant commander.
Frigate captain is a naval rank in the naval forces of several countries. Corvette captain lies one level below frigate captain.
Frigate lieutenant is a naval rank in the naval forces of several countries.
Sargento mayor was a rank immediately below that of maestre de campo in the Spanish tercios of the 16th and 17th centuries. Initially second in rank to a coronel ("colonel") in a colunella, the sargento mayor became second in rank to the maestre de campo after the creation of the tercios in 1534. He took care of the tactical training, security and lodging of the troops of the tercio. He also transmitted the orders of the maestre de campo or the capitán general to subordinate officers.
First sergeant is typically a senior non-commissioned officer rank, used in many countries.
The Armed Forces of Bolivia has four main branches: Army, Navy, Air Force and the National Police Force. Each of the four branches has a similar structure, each having four pay grades: non-commissioned officers, senior non-commissioned officers, commissioned officers and general staff. However, the SNCO roles vary depending on the branch; some of these hold specialisations.
Rank insignia in the French Air and Space Force are worn on the sleeve or on shoulder marks of uniforms
Nicaraguan Army [1] 
