Johan Harmen Rudolf Köhler (3 July 1818 – 14 April 1873) was a Dutch general in the Royal Netherlands East Indies Army. Life. Köhler was born in 1818 in Groningen, the son of a sergeant major in the Royal Dutch Army. He enlisted in the infantry in 1832, at the age of 14, where he steadily progressed through the officer ranks and, in 1839, moved to the Dutch East Indies, where he joined the Royal Netherlands East Indies Army, also steadily climbing the ranks. As a captain in 1856, he partook in a punitive expedition to suppress insurgents in the Lampung District.
https://en.wikipedia.org/wiki/Johan_K%C3%B6hler
Johan Harmen Rudolf Köhler (3 July 1818 – 14 April 1873) was a Dutch general in the Royal Netherlands East Indies Army. Life. Köhler was born in 1818 in Groningen, the son of a sergeant major in the Royal Dutch Army. He enlisted in the infantry in 1832, at the age of 14, where he steadily progressed through the officer ranks and, in 1839, moved to the Dutch East Indies, where he joined the Royal Netherlands East Indies Army, also steadily climbing the ranks. As a captain in 1856, he partook in a punitive expedition to suppress insurgents in the Lampung District.
