The M-84 is based on the Soviet T-72M, the export variant of T-72A, with many improvements, including a domestic fire-control system that the T-72M lacked, improved composite armor, and a 1,000-hp engine. The M-84 entered service with the Yugoslav People's Army in 1984, and the improved M-84A version entered service a few years later. Other variants were introduced laterTriangles: 4.2kVertices: 5.1k