The phrase "a detachment of about" is correct and usable in written English.
It can be used when referring to a specific group or unit, typically in a military or organizational context, indicating an approximate number or size.
Example: "The army deployed a detachment of about 50 soldiers to the region for peacekeeping operations."
Alternatives: "a unit of approximately" or "a group of around".
A detachment of about 50 men from the 111th Airfield Battalion was also on Labuan, along with around 150 men assigned to other small units.
Just before the Axis invasion of Yugoslavia in April 1941, the Yugoslav government provided Pećanac with funds and arms to raise guerrilla units in the southern parts of Serbia, Macedonia and the Kosovo region, and he succeeded in forming a detachment of about 300 men largely in the Toplica river valley in southern Serbia, which avoided destruction during the invasion.
In response to a proposal first made on July 22 by the commander of his German troops, Baron Riedesel, Burgoyne sent a detachment of about 800 troops under the command of Lieutenant Colonel Friedrich Baum from Fort Miller on a foraging mission to acquire horses for the German dragoons, draft animals to assist in moving the army, and to harass the enemy.
In Lithuania, Commonwealth Lithuanian Army numbered about 15,000, with an additional Crown detachment of about 3,000.
Christopher J. DeMure, moved to Nawa with a detachment of Afghan Army soldiers and about a dozen Afghan police officers, including a colonel to relieve Mr. Mohammad.
It's a brutally aggressive drama about a detachment of child soldiers, leaving a trail of carnage in an African war zone that could be (but isn't necessarily) Liberia, where the film was shot.
In late March, the carrier embarked Carrier Air Group 9, which flew two squadrons of Bearcats and F6F Hellcat fighters as well as a squadron each of Helldivers and Avengers, and a detachment of HO3S helicopters for a total of about 100 aircraft.
The force is being expanded from about 4,600 troops to about 6,000, including a detachment of Ukrainian soldiers sent to dig up the land mines scattered around the area.
At an early hour the next morning he resumed the march, striking a detachment of the enemy at Mt. Carmel about daylight, and driving it rapidly to and beyond the North Anna River, where it formed a junction with the main body to which it belonged.
A detachment of that Company, around… ANNALS OF CRIME about counterfeiters.
Two months later, donning Federal uniforms, the raiders surprised a detachment of Union soldiers at Baxter Springs, Kan., and slaughtered about 90 of them.
