John IV, Count of Armagnac

In July 1437, both John and King Henry VI of England signed a treaty, one of the terms being that Armagnac would not allow his subjects to act with hostility towards the English.John took part in the Praguerie (1440) of the barons and the Dauphin of France,[4] but the coalition was overcome by Charles VII, who pardoned the insurrectionists.[4] John was anxious for a strong alliance which would protect him from threats by Charles VII, while the English were looking forward to being able to use his lands as a defensive buffer zone against French attacks.His strategically located territories in southwestern France made him much better positioned to defend Gascony than the English crown."...the count of Armagnac was said to have offered a huge dowry in money, lands and men to help defend the borders of Gascony.
Count of ArmagnacNoble familyArmagnacIsabella d' ÉvreuxMarie, Duchess of AlençonJohn V of ArmagnacCharles I of ArmagnacBernard VII of ArmagnacBonne de BerryFézensacHundred Years' WarBonne of BerryCounty of CommingesMathieu de FoixKing of CastileKing Henry VI of EnglandPraguerieDauphin of FranceCharles VIIbuffer zoneGasconyL'Isle-JourdainCarcassonneJohn IV, Duke of BrittanyJeanne d' ÉvreuxCharles III of NavarreEleanor of CastilleMarie of ArmagnacJohn II of AlençonDuke of AlençonCharles IV, Duke of AlençonJean V of ArmagnacLouis II of Chalon-ArlayCharles I, Count of ArmagnacFour-ValleysMathieu d'EscouchySamaran, C.Bernard VIIJohn V