The US Marine Raiders Monument atop Edson’s Ridge, also known as Bloody Ridge and Raiders Ridge, on Guadalcanal. The Battle of Edson’s Ridge, 12-14 September 1942, was the second of three separate major Japanese ground offensives during the Guadalcanal Campaign. The Marine 1st Raider Battalion held off repeated assaults by a 6,000-strong Japanese force. While the Marines suffered more than 250 casualties, the Japanese Army sustained a staggering 800 casualties during the two-day battle. Photo courtesy of the US Army photo/ Staff Sgt. Armando R. Limon.