At 09:00, Washington arrived from Manhattan.[67] Washington realized that he had been wrong about a feint on Long Island and he ordered more troops to Brooklyn from Manhattan.[67] Washington’s location on the battlefield is not known, because accounts differ, but most likely he was at Brooklyn Heights, where he could view the battle.[68]
On the American right, to the west, Stirling still held the line against Grant.[68] Stirling held on for four hours, still unaware of the British flanking maneuver, and some of his own troops thought they were winning the day because the British had been unable to take their position. However, by 11:00, Grant, reinforced by 2,000 marines, hit Stirling’s center and Stirling was attacked on his left by the Hessians.[65][68] Stirling pulled back but British troops were, at this point, coming at him in his rear south down the Gowanus Road. The only escape route left was across a Brouwer’s millpond on the Gowanus Creek which was 80 yards wide, on the other side of Brooklyn Heights.[69]
Maryland 400
Stirling ordered all of his troops, except a contingent of Maryland troops under the command of Gist, to cross the creek. This group of Maryland troops became known to history as the “Maryland 400”, although they numbered about 260–270 men. Stirling and Gist led the troops in a rear-guard action against the overwhelming numbers of British troops which surpassed 2,000 supported by two cannons.[69]
Stirling and Gist led the Marylanders in two attacks against the British who were in fixed positions in and in front of the Vechte-Cortelyou House (known today as the Old Stone House). After the last assault, the remaining troops retreated across the Gowanus Creek. Some of the men who tried to cross the marsh were bogged down in the mud and under musket fire and others who could not swim were captured.
Stirling was surrounded and, unwilling to surrender, broke through the British lines to von Heister’s Hessians and surrendered to them. Two hundred fifty six Maryland troops were killed in the assaults in front of the Old Stone House, and fewer than a dozen made it back to the American lines.[70] Washington, watching from a redoubt on nearby Cobble Hill (intersection of today’s Court Street and Atlantic Avenue), reportedly said, “Good God, what brave fellows I must this day lose.”[69][note 1]
https://en.wikipedia.org/wiki/Battle_of_Long_Island#Vechte-Cortelyou_House
It irks me about “400”. When I read multiple histories of the RevWar it varied from 200 to 400, often agreed as closer to 300. Just like the Spartans, and was thus often referenced.
By most histories only 9 MDers remained after 5-6 bayonet charges against Germans and Scots. Stirling was captured because he waa compromised, not because he just gave up.