Which event took place during the Siege of Pensacola? Gálvez wanted to invade, but a sandbar at the entrance of Pensacola Bay stopped his advance. Gálvez took command of a ship and led the militia over a sandbar into Pensacola Bay. Gálvez’s troops abandoned him and said, “He can invade alone!” Gálvez was punished by the Spanish royalty for making a big mistake.