21st Brigada de Infantería Mecanizada

​ III/10 Mechanized Infantry Battalion Almansa

IV/10 Armor Battalion Málaga

21st Brigada de Infantería Mecanizada

21st Logistical Group

​21st Field Artillery Group

21st Brigada de Infantería Mecanizada

Hq 21st Mechanized Infantry Brigade

21st Ingenieros Company

I/2 Mechanized Infantry Battalion Princesa

II/2 Mechanized Infantry Battalion Lepanto 

Advanced

​Assault