 A stronger French force and supply convoy managed to break through the Spanish blockade and defeat the more numerous Spanish fleet in a battle off the Lipari Islands on 11 February 1675, ending the Spanish blockade of Messina, so the Spanish then asked for Dutch assistance.De Ruyter was sent to the Mediterranean later in 1675 with eighteen larger warships and a number of smaller vessels, although these vessels were not fully manned.De Ruyter thought the force that had been provided was insufficient for the task, and the shortage of money to repair damaged ships or build new ones or to recruit and pay sufficient sailors as the war continued was now a major problem for the Dutch fleet.