Final answer:
Joan's first examination at Poitiers took place in 1429. It was a significant evaluation of her divine mission and leadership abilities. During the examination, she was questioned by theologians and members of the French court.
Step-by-step explanation:
Joan's first examination at Poitiers was held in 1429. This examination was important because it served as an evaluation of her divine mission and her suitability to lead a military campaign. During the examination, she was questioned by theologians, clerics, and members of the French court to determine the authenticity of her claims and her knowledge of religion.