While the army was preparing to invade Cuba, matters so far as they concerned the navy had been moving along rapidly. Commodore Dewey had sunk the Spanish fleet in Manila Bay; Havana and the adjacent coasts were being blockaded, so no ships could pass in or out without running the risk of capture; and a large fleet of war-ships under Admiral Cervera, of the enemy's navy, had been "bottled up" in Santiago Harbor.