Rumours became rife as 40,000 soldiers and 10,000 sailors were gathered in French Mediterranean ports. A large fleet was assembled at Toulon: 13 ships of the line, 14 frigates, and 400 transports. To avoid interception by the British fleet under Nelson, the expedition's target was kept secret. It was known only to Bonaparte himself, his generals Berthier and Caffarelli, and the mathematician Gaspard Monge. Bonaparte was the commander, with subordinates including Thomas Alexandre Dumas, Kléber, Desaix, Berthier, Caffarelli, Lannes, Damas, Murat, Andréossy, Belliard, Menou, and Zajączek. His aides de camp included his brother Louis Bonaparte, Duroc, Eugène de Beauharnais, Thomas Prosper Jullien, and the Polish nobleman Joseph Sulkowski.