A lull occurred in the air war over Guadalcanal, with no Japanese air raids between 14 and 27 September due to bad weather, during which both sides reinforced their respective air units. The Japanese delivered 85 fighters and bombers to their air units at Rabaul while the U.S. brought 23 fighters and attack aircraft to Henderson Field. On 20 September the Japanese counted 117 total aircraft at Rabaul while the Allies tallied 71 aircraft at Henderson Field. The air war resumed with a Japanese air raid on Guadalcanal on 27 September which was contested by U.S. Navy and Marine fighters from Henderson Field.