Wiktionary
n. (context military English) A grouping of several types of troops assembled to fight together
Wikipedia
A battlegroup (British/Commonwealth term), or task force (U.S. term) in modern military theory is the basic building block of an army's fighting force. A battlegroup is formed around an infantry battalion or armoured regiment, which is usually commanded by a lieutenant colonel. The battalion or regiment also provides the command and staff element of a battlegroup, which is complemented with an appropriate mix of armour, infantry and support personnel and weaponry, relevant to the task it is expected to perform.
The organisation of a battlegroup is flexible, and can be restructured quickly to cope with any changes in the situation. Typically, an offensive battlegroup may be structured around an armoured regiment, with two squadrons of main battle tanks supported by an infantry company; conversely, a more defensive battlegroup may be structured around an infantry battalion, with two companies and an armoured squadron. In support would be a reconnaissance troop, a low-level air defence detachment, an anti-tank section and engineering detachment, plus artillery support.
Battlegroups are often subdivided into company groups (called "teams" in the U.S. Army) consisting of a single infantry company supported by a tank troop and various other support units.
Usage examples of "battlegroup".
Rear Admiral Jennifer Husac's two battlegroups of Dunkerque-class battlecruisers were TF 59's rearmost units, trailing astern of the battle-line as it fell steadily back before the advancing superdreadnoughts, leading them away from the Justin warp point.
Twenty-seven superdreadnoughts - a small force beside the ones waging such titanic combat on the Justin front, yet impossible odds for a single light battlegroup - were screened by nine battlecruisers and thirty-three light cruisers, including a dozen of those the Humans had codenamed Cataphract.
She stared for a moment at the icon that represented her own little battlegroup - in addition to the battlecruisers she had the Hun-class scout cruiser Uzbek and the CLE Marblehead - and then turned to Hafezi.
Thirty-two superdreadnoughts, eleven assault carriers, six fleet carriers, three light carriers, five battleships, thirty battlecruisers, ten light cruisers, eleven hundred fighters, and twenty-eight support ships had been destroyed outright, and the ships which could still fight wouldn't have made three battlegroups.
Her battlegroup was disbanded as Bayonet and Sawfly, the last surviving units, were repaired and transferred to other squadrons, and even her surviving staff was on the binnacle list.
One of the things fighter jocks hated most about command datalink was the way that it permitted other units of a battlegroup to pour defensive fire into the blind zones of their group mates.