 The first such raid was against Kobe on 4 February 1945.Tokyo was hit by incendiaries on 25 February 1945 when 174 B-29s flew a high altitude raid during daylight hours and destroyed around (2.6 km2) of the snow-covered city, using 453.7 tons of mostly incendiaries with some fragmentation bombs.After this raid, LeMay ordered the B-29 bombers to attack again but at a relatively low altitude of and at night, because Japan's anti-aircraft artillery defenses were weakest in this altitude range, and the fighter defenses were ineffective at night.