Their first target, the isle of Saint Vincent, fell on 18 June, and d'Estaing turned his attention to other islands. He had hoped to capture the key British possession, Barbados, but after making no progress against the prevailing easterly trade winds, he turned his attention instead to Grenada. The French fleet arrived off Grenada on 2 July, and stormed its main defences beginning late on 3 July. Terms of capitulation were agreed on 4 July. On the way, the French squadron met the 50-gun "Fier Rodrigue", under Chevalier de Montault, a letter of marque belonging to Beaumarchais and escorting a convoy. They commandeered "Fier Rodrigue", and she took a place in the French line of battle.