 In opening moves of the Edwardian War, Suffolk was sent on 3 October 1337, with Henry Burghersh, the Earl of Northampton, and Sir John Darcy, to treat for peace or a truce with the French.Further powers were given them to deal with Louis IV, Holy Roman Emperor and other allies, and on 7 October they were also commissioned to treat with David Bruce, then staying in France, and were accredited to the two cardinals sent by the pope to make an Anglo-French reconciliation.Next year, on 1 July, Suffolk was associated with John de Stratford and others on an embassy to France, and left England along with the two cardinals sent to treat for peace.