Imperialization assets were enforced by the Imperial Navy.
Nationalization, also referred to as Imperialization, describes the process by which the Galactic Empire assumed control over the administration of entities that had previously been autonomous during the era of the Galactic Republic. Both Corellian Engineering Corporation and Incom Corporation had been Imperialized by the Battle of Scarif.
Following the Battle of Endor in the subsequent months, Gallius Rax, a Fleet Admiral, nationalized every aspect of military industrial output. Despite this, Fondor Shipyards managed to maintain their independence. Years afterwards, Kylo Ren, the Supreme Leader, directed the First Order to implement a different strategy, ensuring the complete takeover of the shipyards.