 Both sides had victories over the other here in 1641 and both sides were strengthened in 1642, when General Munroe arrived to bolster the royalist forces and Owen Roe O'Neill came to lead the Irish insurrection.In 1689 the Jacobite garrison here was for a time under the command of King James' son, the Duke of Berwick.After lifting the siege of Derry, King William's army billeted at Trillick on its way back to Enniskillen in August 1689.