reconquer
/rɪkɒnˈkwɜr/Definitions
1. verb
to regain control of something that has been conquered or occupied by an enemy
“The army began to reconquer the lost territory, fighting bravely against the enemy forces.”
2. noun
the act of regaining control of something that has been conquered or occupied by an enemy
“The reconquest of the city was a major achievement for the military.”