Original sentence: The geobukseon were said to be ironclads; however, they were not fully covered but rather roofed with iron plates or metal thorns so that enemy soldiers could not take the ships
Edited sentence: The geobukseon were said ironclads; however, they were not fully covered in iron, of course, due to the limited ship-bulding technology at that time, but rather roofed with iron plates and metal thorns to keep the Japanese invaders from taking over the ships, as they relied on raiding