With the siege going nowhere and constant Spanish failures, the besiegers were reinforced by French forces under de Crillon, who took over command in early 1782. After a lull in the siege, during which the Franco-Spanish besiegers gathered more guns, ships and troops, a "Grand Assault" was launched on 18 September 1782. This involved huge numbers—60,000 men, 49 ships of the line and ten specially designed, newly invented floating batteries—against the 5,000 defenders. The assault proved to be a disastrous and humiliating failure, resulting in heavy losses for the Bourbon attackers. This was the largest action fought during the war in terms of numbers.