 In one encounter in late February, British Colonel Charles Mawhood, thinking he had flanked a party of New Jersey militia, suddenly found his advance force flanked by another, larger force.As they were driven back toward Amboy, more and more Americans appeared, ultimately inflicting about 100 casualties.The elite grenadiers of the 42nd Foot, part of Mawhood's vanguard, were badly mauled in the encounter.