During the Battle of the Brandywine, as fighting formations fell into disarray, British soldiers rushed forward with bayonets, while Continental soldiers, unfamiliar with using bayonets, defended themselves with the butts of their muskets. Accustomed to intimidating the Continental Army, the British were surprised by its determination. The Continental Army was made up of regulars and local citizen militias trained to protect their communities in emergencies, and they were comfortable using trees and stone walls for shelter while firing muskets, though they often fled before the approach of formal British lines. The British Army was professionally trained, well equipped, and dressed in uniforms designed to intimidate opponents. The British Guards, or His Majesty's Foot Guards, were an elite force of British aristocrats, while the Grenadiers were chosen from the strongest and largest men, their height made more intimidating by tall bearskin caps. The Light Infantry and Hessian Jaegars were agile and could cover ground quickly. A British lieutenant recalled that the day’s fatigue was excessive, that some of their best men had to give way, that one of the 33rd dropped dead of heat stroke, and that without daylight they could not pursue effectively after marching through the night of the 9th, moving artillery 17 miles, and fighting on the 11th against an army strongly posted, numerous, and unfatigued.