While the British did eventually take the hill that day, their losses were formidable, especially among the officers. After the arrival of General George Washington two weeks after the battle, the siege reached a stalemate until March the next year, when cannon seized at the Capture of Fort Ticonderoga were positioned on Dorchester Heights in a deft night manoeuvre. This placement threatened the British fleet in Boston Harbor and forced General Howe to withdraw all his forces from the Boston garrison and sail for Halifax, Nova Scotia.