the Despenser family. Hugh Despenser the Elder had served both Edward and his father, while Hugh Despenser the Younger had married into the wealthy de Clare family, became the King's chamberlain, and acquired Glamorgan in the Welsh Marches in 1317. Hugh the Younger subsequently expanded his holdings and power across Wales, mainly at the expense of the other Marcher Lords. The Earl of Lancaster and the Despensers were fierce enemies, and Lancaster's antipathy was shared by most of the Despensers' neighbours, including the Earl of Hereford, the Mortimer family and the recently elevated Hugh Audley and Roger Damory. Edward, however, increasingly relied on the Despensers for advice and support, and he was particularly close to Hugh the Younger, whom one chronicler noted he "loved ... dearly with all his heart and mind". In early 1321, Lancaster mobilised a coalition of the Despensers' enemies across the Marcher territories. Edward and Hugh the Younger became aware of these plans in March and headed west, hoping that negotiations led by the moderate Earl of Pembroke would defuse the crisis. This time, Pembroke made his excuses and declined to intervene, and war broke out in May. The Despensers' lands were quickly seized by a coalition of the Marcher Lords and the local gentry, and Lancaster held a high-level gathering of the barons and clergy in June which condemned the Despensers for having broken the Ordinances. Edward attempted reconciliation, but in July the opposition occupied London and called for the permanent removal of the Despensers. Fearing that he might be deposed if he refused, Edward agreed to exile the Despensers and pardoned the Marcher Lords for their actions. Edward began to plan his revenge. With the help of Pembroke, he formed a small coalition of his half-brothers, a few of the earls and some of the senior clergy, and prepared for war. Edward started with Bartholomew de Badlesmere, 1st Baron Badlesmere, and Isabella was sent to Bartholomew's stronghold, Leeds Castle, to deliberately create a casus belli. Bartholomew's wife, Margaret, took the bait and her men killed several of Isabella's retinue, giving Edward an excuse to intervene. Lancaster refused to help Bartholomew, his personal enemy, and Edward quickly regained control of south-east England. Alarmed, Lancaster now mobilised his own army in the north of England, and Edward mustered his own forces in the south-west. The Despensers returned from exile and were pardoned by the royal council.