It was part of the Loire Campaign during the Hundred Years' War, where the forces of Charles VII of France successfully recaptured much of the region, following their victory at the Siege of Orléans.
If the English had been able to secure complete control of the Loire valley, the southern part of France, the last remaining position of the Dauphin would be open to invasion.
In early March 1429, Joan of Arc arrived at Chinon to meet with Charles VII and, after being examined by church officials in Poitiers, joined a large force which set out to relieve the siege at Orléans.
Following the lifting of the siege of Orléans, Charles VII's forces spent the next month or so recruiting and growing in strength for the next phase of military operations.
In early June, at a meeting of French military leaders in the presence of Charles VII, it was decided to pursue a strategy of clearing the Loire River valley of English troops.
Meanwhile, on 8 June, Sir John Fastolf finally left Paris with a reinforcing army of several thousand, headed for the Loire River valley.
Conquered by the English a few years earlier as a staging point for a planned invasion of southern France, the city was defended by a wall with several towers and fortified gates.