In 1489 he crossed to
Calais, raised the siege of
Diksmuide, and took
Ostend from the French. In 1490 he was sent to the
Duchess Anne in Brittany to arrange the terms of a treaty against France, and later in the year he was appointed commander of a body of troops sent to her assistance. In June 1492, Brittany having now lost her independence, he was again sent over to France, but this time as ambassador, with Foxe, then
bishop of Bath and Wells, to negotiate a treaty of peace with
Charles VIII. No settlement, however, was arrived at, and the king four months later invaded France and
besieged Boulogne. The French then at once agreed to treat, and Daubeney was commissioned to arrange a treaty with the Sieur des Querdes, which was concluded at
Étaples on 3 November. In 1495, after the execution of
Sir William Stanley, he was made
Lord Chamberlain. On the meeting of parliament in October the same year he was elected one of the triers of petitions, as he also was in the parliaments of 1497 and 1504. In 1496 he, as the lieutenant of Calais, with Sir Richard Nanfan his deputy there, was commissioned to receive for the king payment of the twenty-five thousand francs due half-yearly from the French king under the
Peace of Étaples. In 1497 the king had prepared an army to invade Scotland to punish
James IV for his support of
Perkin Warbeck, and had given the command to Daubeney. He had hardly marched when he was recalled to put down the
Cornish rebels, who came to
Blackheath unmolested, and was criticised by the king. He set on the rebels at
Deptford Strand, and they took him prisoner, but soon after let him go and were defeated (17 June). This ended the Cornish revolt. In September, Perkin having landed in Cornwall, there was a new disturbance in the west, to meet which Daubeney was sent with a troop of light horse, announcing that the king himself would shortly follow. The siege of
Exeter was raised on his approach, and Perkin soon left. ==Later life==