Commando was formally established in 1962, formerly known as the U.S. navy underwater blasting team. By 1988, it has expanded to two battle groups and seven squadrons, with about 1600 people. SEALs have now become killers of low-intensity wars and emergencies in the United States.

A SEAL team consists of three 40-person work units, and each work unit includes a command. A command consists of a work unit lieutenant colonel (O-5), a work unit veteran (E-8), a planning target/action officer (O-2/3) and a target/action third-level sergeant or staff sergeant (E-6/7). Below the headquarters, there are two rows of 16 soldiers (including two officers, 14 conscripts, and sometimes two EOD CEOs become 18) and a logistics staff. For operational purposes, each work unit can be easily divided into four groups or eight four-person firepower groups, and each seal team is quite close to the work unit and support personnel, with about 300 personnel. Every platoon 16 soldiers includes a supervisor (OIC, the officer in charge, usually O-3), an assistant supervisor (AOIC, the assistant officer in charge, usually O-2), a platoon leader (E-7) and a staff sergeant (LPO, Chief Petty Officer, E). Occasionally, there will be 3O personnel, that is, second lieutenants (O- 1) deployed for the first time, so sometimes a platoon consists of three non-commissioned officers and 13 soldiers.

The core of a work unit includes snipers, saboteurs, communicators, navigation engineers, health workers, close support, navigators, major vehicle drivers, heavy weapon operators, secret location developers, air combat noncommissioned officers, climbing leaders, navigation drivers, interrogators, explosive handlers, technical supervisors and advanced special operations.