Encountering similar lack of stopping power issues as Cooper, the need for a large bore round for the AR-15 platform came about from informal discussion of members of the special operations command, specifically Task Force Ranger's experience in the Battle of Mogadishu (1993) that multiple shots were required to incapacitate members of the opposing force. Many Somalis would chew the drug Khat all day and the effects of the drug would both curb their appetite and increase their pain tolerance. Consequently Marty ter Weeme of Teppo Jutsu designed the .458 SOCOM cartridge in 2000 and Tony Rumore of Tromix was contracted to build the first .458 SOCOM rifle in February 2001. Later even more Thumper rounds have been developed for the AR-15 platform in the US and in other countries such as the .458 Alpine, .458 Silent death and .460 Alliance,