In early November, Allied intelligence learned that the Japanese were preparing again to try to retake Henderson Field. In response the U.S. sent Task Force 67, a large reinforcement and resupply convoy carrying Marine replacements, two U.S. Army infantry battalions, and ammunition and food, commanded by Turner, to Guadalcanal on 11 November. The supply ships were protected by two task groups, commanded by Rear Admirals Daniel J. Callaghan and Norman Scott, and aircraft from Henderson Field. The ships were attacked several times on 11 and 12 November by Japanese aircraft from Rabaul staging through an air base at Buin, Bougainville, but most were unloaded without serious damage.