Complex sentence: President Jammeh received a secondary school education in Bwiam and then joined the Gambian National Army in 1984, was commissioned a Lieutenant in 1989, and in 1992 became commander of the Gambian Military Police.
Split into simpler sentences: President Jammeh received a secondary school education in Bwiam. Jammeh joined the Gambian National Army in 1984, was commissioned a Lieutenant in 1989, and in 1992 became commander of the Gambian Military Police.