A third mass of troops – the German and Spanish heavy cavalry under Lannoy himself, as well as d'Avalos's Spanish infantry – had meanwhile been moving through the woods to the west, closer to where Francis was encamped. The French did not realize the magnitude of the Imperial attack for some time; however, by about 7:20am, d'Avalos's advance had been spotted by a battery of French artillery, which commenced firing on the Spanish lines. This alerted Francis, who launched a charge against Lannoy's outnumbered cavalry with the entire force of French gendarmes, scattering the Spanish by 7:40am.