But when Hugh O'Neill and the other rebel earls left Ireland in the so-called 1607 Flight of the Earls to seek help from the Spanish Crown for a new rebellion, the Lord Deputy Arthur Chichester seized the opportunity to colonise the province and declared the lands of O'Neill, O'Donnell and their followers forfeit. Initially, Chichester planned a fairly modest plantation, including large grants to Irish-born lords who had sided with the English during the war. However, in 1608 Cahir O'Doherty's rebellion in Donegal interrupted implementation of this plan. O'Doherty was a former ally of the English who felt he had not been fairly rewarded for his role in the war. The rebellion was swiftly put down and O'Doherty killed, but these events gave Chichester a justification for expropriating all of the original landowners in the province.