South Korea's Hyundai Rotem plans to acquire Hyundai Wia's defense business for 358.4 billion won ($270 million) to strengthen its defense operations and expand its presence in global markets. Hyundai Rotem said Monday it had signed an agreement to acquire Hyundai Wia's special business division, which manufactures main guns for K2 tanks and gun barrels for K9 self-propelled howitzers. The division also develops naval guns, remote-controlled