He landed on the 25th day of May, 1315, in the Glendun river, near Glenarm, and was promptly joined by Donald O'Neil, and twelve other chiefs. Their first advance was from the coast towards that angle of Lough Neagh, near which stands the town of Antrim. Here, at Rathmore, in the plain of Moylinny, they were attacked by the Mandevilles and Savages of the Ards of Down, whom they defeated. From Antrim they continued their route evidently towards Dublin, taking Dundalk and Ardee, after a sharp resistance. At Ardee they were but 35 miles north of Dublin, easy of conquest, if they had been provided with siege trains—which it seemed they were not. While Bruce and O'Neil were coming up from the north, Hugh O'Donnell, lord of Tyrconnell, as if to provide occupation for the Earl of Ulster, attacked and sacked the castle and town of Sligo, and wasted the adjacent country. The Earl, on hearing of the landing of the Scots, had mustered his forces at Athlone, and compelled the unwilling attendance of Felim O'Conor, with his clansmen. From Athlone he directed his march towards Drogheda, where he arrived with "20 cohorts," about the same time that the Lord Deputy Butler came up with "30 cohorts." Bruce, unprepared to meet so vast a force—taken together some 25,000 or 30,000 men—retreated slowly towards his point of debarkation. De Burgh, who, as Commander-in-Chief, took precedence in the field of the Lord Deputy, ordered the latter to protect Meath and Leinster, while he pursued the enemy. Bruce, having despatched the Earl of Moray to his brother, was now anxious to hold some northern position where they could most easily join him. He led de Burgh, therefore, into the North of Antrim, thence across the Bann at Coleraine, breaking down the bridge at that point. Here the armies encamped for some days, separated by the river, the outposts occasionally indulging in a "shooting of arrows." By negotiation, Bruce and O'Neil succeeded in detaching O'Conor from de Burgh. Under the plea—which really had sufficient foundation—of suppressing an insurrection headed by one of his rivals, O'Conor returned to his own country. No sooner had he left than Bruce assumed the offensive, and it was now the Red Earl's turn to fall back. They retreated towards the castle of Conyre (probably Conor, near Ballymena, in Antrim), where an engagement was fought, in which de Burgh was defeated, his brother William, Sir John Mandeville, and several other knights being taken prisoners. The Earl continued his retreat through Meath towards his own possession; Bruce followed, capturing in succession Granard, Fenagh, and Kells, celebrating his Christmas at Loughsweedy, in West-Meath, in the midst of the most considerable chiefs of Ulster, Meath, and Connaught. It was probably at this stage of his progress that he received the adhesion of the junior branches of the Lacys—the chief Norman family that openly joined his standard.