Lunga Point
By nightfall on 8 August, the 11,000 Allied troops secured Tulagi, the nearby small islands, and a Japanese airfield under construction at Lunga Point on Guadalcanal (later renamed Henderson Field). Allied aircraft operating out of Henderson were called the "Cactus Air Force" (CAF) after the Allied code name for Guadalcanal. To protect the airfield, the U.S. Marines established a perimeter defense around Lunga Point. Additional reinforcements over the next two months increased the number of U.S. troops at Lunga Point to more than 20,000 men.