The Battle of Germantown on 4 October 1777 pitted a 9,000-man British army under General William Howe, 5th Viscount Howe against an 11,000-strong American army commanded by General George Washington. After an initial advance, the American reserve allowed itself to be diverted by 120 English soldiers holding out in the Benjamin Chew House. A heavy morning fog disoriented the American assault columns and led to a friendly fire incident between elements of Major General John Sullivan's right column and Major General Nathanael Greene's left column. At about this time, the American attack lost impetus and both columns retreated. Meanwhile, two wide flanking columns numbering 3,000 American militia had little effect on the outcome. American losses was numbered at 673 soldiers killed and wounded