Throughout its history Manjil has been a gate to the southern
Caspian Sea region. There are numerous archaeological site excavations (mostly illegal) in the Manjil area because of its rich cultural history. Some of these sites are related to the
Ismaili era, i.e.,
Hassan Sabbah movement based in Alamoot forte (one may find artifacts from the 3rd-2nd millennia BC in some households).
Modern history In the modern era, Manjil was the site of a historical battle between the nationalist revolutionary forces of Jangal (led by
Mirza Koochak Khan) and the joint
British and
White Russian forces on June 12, 1918. The latter forces (led by
General Dunsterville and Colonel
Bicherakhov) willing to pass through Manjil as the only passage to the Caspian to reach
Baku and overthrow the newly formed
Baku Commune (led by
Stepan Shahumian). General Dunsterville's private diaries and notes, including those kept during his command of the Dunsterforce Mission to North
Persia and Baku, 1918 were transcribed from the original by General Dunsterville's great-granddaughter, and are co-located on the Great War Primary Documents Archive. Although devastated by a
1990 Manjil–Rudbar earthquake of magnitude 7.3, for the last few decades Manjil has enjoyed industrial and economic growth. ==Demographics==