The primary causes of Joan of Arc's eventual trial and execution were her visions and claims of divine guidance, which she asserted were from Saints instructing her to lead the French army. Her support of Charles VII and victory at Orléans bolstered French morale during the Hundred Years' War. However, she was captured by the Burgundians and handed over to the English, who sought to discredit her. The trial, motivated by political and religious factors, culminated in her being condemned for heresy and witchcraft, leading to her execution in 1431.