Batalyon Artileri Medan 11 ("11th Field Artillery Battalion") is a unit of the Indonesian Army, also known as the Guntur Geni, Geni 11, or "Guntur Armed Battalion".
It is part of the Resimen Artileri Medan 1 (1st Field Artillery Regiment), Infantry Division 2 Kostrad.
The battalion was established on June 27, 1962, and is located in Magelang, Central Java. It is equipped with the Yugoslavian 76 mm M-48 howitzer.
References
Field Artillery Battalion 11 Wikipedia(Text) CC BY-SA