Aside from taking over Luanda, East Africa has already started a new wave of population migration, and nothing reassures control over Angola more than immigration.
Of course, this is also to preserve Portugal's legacy and avoid resource waste. Although the Portuguese government has been expelled, production in Angola must continue.
Angola is very different from the regions previously occupied by East Africa. Under Portuguese governance, though not highly developed, its agricultural conditions are advantageous, and East Africa cannot simply ignore its vast plantations.
After all, in the non-mechanized era, land reclamation was very challenging, as East Africa deeply understands. It took East Africa over twenty years to build its national agricultural scale through significant time and labor costs.
Now Angola has vast plantations ready to be exploited, much easier than re-cultivating lands in East Africa.
