Cannabis may have arrived in the Congo region in the 1850s, carried by Swahili traders from Zanzibar. Within thirty years it was at the centre of a religious movement in the south- west, and it is today the only drug produced in the country, one of Africa's larger producers, mostly for local use.[1]
Listed for context. No score change is recorded for DR Congo here.
References
Checked. The date and the event were compared with a source that was read.