Landmines were laid in Angola during the 27 years of bitter conflict that followed independence from Portugal in 1975.
Government and Cuban forces laid extensive minefields around their bases, in and around towns as well as around infrastructure such as airports, water supply stations, electricity pylons and bridges. UNITA and other factions laid mines when they gained a permanent position or before withdrawing from a captured post.
As towns and strategic positions changed hands during the course of the war so more landmines were laid each time a town or position was occupied by a different combatant group. Both sides laid a significant number of anti-tank mines on primary, secondary and tertiary roads and to this day anti-tank mines on roads pose a far greater problem than in any other mine affected country.