Complex sentence: In February 2016, the ROK Navy completed a new naval base on the southern coast of Jeju-do for basing the Maritime Task Flotilla and a submarine squadron, in order to strengthen its control over the seas around the Korean Peninsula by deploying these forces.
Split into simpler sentences: In February 2016, the ROK Navy completed a new naval base on the southern coast of Jeju-do for basing the Maritime Task Flotilla and a submarine squadron. The ROK Navy plans to strengthen its control over the seas around the Korean Peninsula by deploying these forces.