Ross was killed in action at the battle of North Point, picked off by an American rifleman if I recall correctly.
The Maryland militia, the 'City' or 3d Brigade of the Maryland, a volunteer militia unit, was commanded by General John Stricker who had been a captain of artillery in the Continental Army.
The brigade was composed of five infantry regiments, a small cavalry outfit, a battalion of riflemen and an artillery company composed of six 4-pounders.
Stricker skillfully conducted a delaying action against Ross' command, now under Colonel Arthur Brooke after Ross being shot out of his saddle.
Interestingly, the Americans inflicted more casualties than they incurred-the British lost 46 killed and 300 wounded; the Americans 24 killed, 139 wounded, and 50 captured or missing. The captured were mostly wounded who could not be brought off.