The aircraft carrier dramatically changed naval combat in the war, as air power became a significant factor in warfare. The advent of aircraft as primary weapons was driven by the superior range, flexibility and effectiveness of carrier-launched aircraft. They had higher range and precision than naval guns, making them highly effective. The versatility of the carrier was demonstrated in November 1940 when launched a long-range strike on the Italian fleet at their base in Taranto, signalling the beginning of effective and highly mobile aircraft strikes. This operation incapacitated three of the six battleships at a cost of two torpedo bombers.