(DOD, NATO) 1. A temporary grouping of units, under one commander, formed for the
purpose of carrying out a specific operation or mission. 2. Semi-permanent organization of
units, under one commander, formed for the purpose of carrying out a continuing specific
task. 3. A component of a fleet organized by the commander of a task fleet or higher
authority for the accomplishment of a specific task or tasks. See also force(s).