The town became strategically more significant during the Tudor conquest of Ireland and came under frequent attack. During O'Doherty's Rebellion in 1608 it was attacked by Sir Cahir O'Doherty, Irish chieftain of Inishowen, who burnt much of the town and killed the governor George Paulet. The soldier and statesman Sir Henry Docwra made vigorous efforts to develop the town, earning the reputation of being " the founder of Derry"; but he was accused of failing to prevent the O'Doherty attack, and returned to England.