In Connaught, the surrender of Galway, on the 20th of June, eclipsed all the previous successes, and they were not a few, of Lieutenant-General Burke. From the day Lord Ranelagh and the younger Coote deserted the Western province, the Confederate cause had rapidly advanced. The surrender of "the second fort in the Kingdom"—a sea-port in that age, not unworthy to be ranked with Cadiz and Bristol, for its commercial wealth and reputation—was a military event of the first importance. An English fleet appeared three days after the surrender of Willoughby, in Galway harbour; but nine long years elapsed before the Confederate colours were lowered from the towers of the Connaught citadel.
In the North, O'Neil, who, without injustice to any of his contemporaries, may certainly be said to have made, during his seven years' command, the highest European reputation among the Confederate generals, gathered his recruits into a rugged district, which forms a sort of natural camp in the north-west corner of the island. The mountain plateau of Leitrim, which sends its spurs downwards to the Atlantic, towards Lough Erne, and into Longford, accessible only by four or five lines of road, leading over narrow bridges and through deep defiles, was the nursery selected by this cautious leader, in which to collect and organize his forces. In the beginning of May—seven months after the date of his commission, and ten from his solitary landing at Doe Castle—we find him a long march from his mountain fortress in Leitrim, at Charlemont, which he had strengthened and garrisoned, and now saved from a surprise attempted by Monroe, from Carrickfergus. Having effected that immediate object, he again retired towards the Leitrim highlands, fighting by the way a smart cavalry action at Clonish, with a superior force, under Colonels Stewart, Balfour, and Mervyn. In this affair O'Neil was only too happy to have carried off his troop with credit; but a fortnight brought him consolation for Clonish in the brilliant affair of Portlester. He had descended in force from his hills and taken possession of the greater part of the ancient Meath. General Monk and Lord Moore were despatched against him, but reinforced by a considerable body of Meathian Confederates, under Sir James Dillon, he resolved to risk his first regular engagement in the field. Taking advantage of the situation of the ground, about five miles from Trim, he threw up some field works, placed sixty men in Portlester mill, and patiently awaited the advance of the enemy. Their assault was overconfident, their rout complete. Lord Moore, and a large portion of the assailants were slain, and Monk fled back to Dublin. O'Neil, gathering fresh strength from these movements, abandoned his mountain stronghold, and established his head-quarters on the river Erne between Lough Oughter (memorable in his life and death) and the upper waters of Lough Erne. At this point stood the town of Belturbet, which, in "the Plantation" of James I., had been turned over exclusively to British settlers, whose "cagework" houses, and four acres of garden ground each, had elicited the approval of the surveyor Pynnar, twenty years before. The surrounding country was covered with the fortified castles and loop-holed lawns of the chief _Undertakers_—but few were found of sufficient strength to resist the arms of O'Neil. At Belturbet, he was within a few days' march of the vital points of four other counties, and in case of the worst, within the same distance of his protective fastness. Here, towards the end of September, busied with present duties and future projects, he heard, for the first time, with astonishment and grief, that the requisite majority of "the Supreme Council" had concluded, on the 13th of that month, a twelve-months' truce with Ormond, thus putting in peril all the advantages already acquired by the bravery of the Confederate troops, and the skill of their generals.