Morgan did not stay long in Port Royal and in October 1668 sailed with ten ships and 800 men for Île-à-Vache, a small island he used as a rendezvous point. His plan was to attack the Spanish settlement of Cartagena de Indias, the richest and most important city on the Spanish Main. In December he was joined by a former Royal Navy frigate, "Oxford", which had been sent to Port Royal to aid in any defence of Jamaica. Modyford sent the vessel to Morgan, who made it his flagship. On 2 January 1669 Morgan called a council of war for all his captains, which took place on "Oxford". A spark in the ship's powder magazine destroyed the ship and over 200 of its crew. Morgan and the captains seated on one side of the table were blown into the water and survived; the four captains on the other side of the table were all killed.