In addition to his inherited estates, Louis XII of France made Bertrand de la Jaille the squire of his household, Counsellor and then Chamberlain to the Crown. In 1429, Bertrand de la Jaille succeeded his father as the captain-governor of the city of Loudun. The same year, a Commission of Doctors of Theology recognised Joan of Arc's mission to crown Charles VII of France was divinely inspired. In April, after Joan's recognition of Charles in Chinon, and to relieve the siege of Orléans, the King sent "Monseigneur de la Jaille" ahead of his forces. His second son, Pierre de la Jaille, born in 1419, was brought up as Page to the Arthur, Count of Richemont and was his Squire at the age of ten in 1429 when Arthur de Richemont came to the rescue of Joan of Arc. They were probably therefore involved in the most significant military action prior to Joan's arrival in late April outside Rouvray where a thousand French and Scottish soldiers attempted unsuccessfully to intercept and divert an English supply convoy in the Battle of the Herrings, so named because the convoy was carrying a large supply of fish for Lent. They also fought alongside Joan of Arc at the battle of Patay in 1429.