sentences:  John de Mowbray, born 25 June 1340 at Epworth, Lincolnshire, was the son of John de Mowbray, 3rd Baron Mowbray, of Axholme, Lincolnshire, by his second wife, Joan of Lancaster, third daughter of Henry, 3rd Earl of Lancaster.Mowbray and twenty-six others were knighted by King Edward III of England in July 1355 while English forces were at the Downs, before sailing to France.In 1356, he served in a campaign in Brittany.