 Polisario later gained access to heavier equipment, but four-wheel drive vehicles remain a staple of their arsenal.The Moroccan army quickly changed their strategy and created mounted units using technicals to challenge Polisario speed and hit & run strategies in the large desert, where they [Moroccan mounted units] proved their efficiency.In 1987, Chadian troops equipped with technicals drove the heavily mechanized Libyan army from the Aozou Strip.