This short video shows Armenian troops launching the massive OTR-21 Tactical Ballistic Missile during their short lived 2020 war.

The OTR-21 is a mobile missile launch system, designed to be deployed along with other land combat units on the battlefield. While the 9K52 Luna-M is large and relatively inaccurate, the OTR-21 is much smaller. The missile itself can be used for precise strikes on enemy tactical targets, such as control posts, bridges, storage facilities, troop concentrations and airfields. The fragmentation warhead can be replaced with a nuclear, biological or chemical warhead. The solid propellant makes the missile easy to maintain and deploy.