This allowed the relief ships to reach Shipquay where they unloaded food for the starving city. By the evening of the 31 July, the Jacobites forces were marching towards Lifford. Marshall Schomberg was sent by William in August 1689 with a force of 15,000 to bolster the Protestant loyalists, William himself arrived in June of 1690 with a mixed force of 36,000 troops which included Irish, English, Danish, Scots, Welsh, Polish, French and Dutch, this led to a series of battles with the eventual defeat of James ll who returned to France. The Walls of Derry are fabulous to visit and walk around and unique, you can walk around the entire walled city in thirty minutes, passing over the gates that featured in one of Europe's major political and religious upheavals.