The ultimatum embodied in the foregoing being rejected by Spain, diplomatic relations were severed and hostilities ensued. On May 1, at daybreak, the Asiatic squadron, commanded by Commodore Dewey, arrived at Manila from Hong Kong. At Cavite, within the harbor, protected by four batteries, lay the Spanish fleet. It was commanded by Admiral Patricio Montojo. The squadron proceeded up the bay unmolested and made for the naval station. Two mines were exploded, but ineffectively. At five o’clock and ten minutes the Spaniards opened fire. Commodore Dewey set the signals, and his entire squadron advanced to short range. The squadron consisted of the following cruisers and gunboats: “Olympia,” “Baltimore,” “Boston,” “Raleigh,” “Concord,” “Petrel,” and “McCulloch.” At 5.30 the “Olympia’s” 8-inch guns opened, and the squadron swung in front of the Spanish ships and forts in single file, firing their port guns. Then, wheeling, they passed back, firing their starboard guns. This maneuver was repeated five times, the entire American fleet passing all the Spanish ships and batteries at each maneuver, and each time drawing in closer and closer and delivering fire at more deadly range. During two hours and a half there was tremendous resistance by the Spaniards. They had eleven ships and five land batteries in full play, against six American warships. But the American marksmanship was faultless. Every shot seemed to count against ship or shore battery, while most of the Spanish powder was burned in vain. At 7.45 A.M. the American fleet withdrew to ascertain damages and permit the smoke to clear. It was seen then that several Spanish ships were crippled or burning, and it was found that the American vessels had suffered hardly at all. Admiral Dewey called his captains into consultation and arrangements were made for another attack. At 10.40 the attack was renewed, the “Baltimore” leading. She advanced right upon the enemy, shelling them constantly, and the other Americans followed, working their guns as rapidly as they could load and fire. The effect of this assault was terrific. Ship after ship of the Spaniards sunk or was run ashore to keep them from sinking or falling into American hands. At 12.45 P.M. the Spaniards struck their colors in token of surrender. Admiral Patricio Montojo fled to Manila, and most of the survivors fled with him. This ended the work of May 1.