 In 717 Fogartach caused some manner of disturbance at the Óenach Tailten—an annual Uí Néill gathering held at Teltown—where two men were killed.Then in 718 Conall Grant won a victory over a coalition of southern Ui Neill kings at the Battle of Cenannas (near Kells) as part of the internal feuds of the Síl nÁedo Sláine.In frustration, Fergal intervened and had Conall killed two months later.