https://en.wikipedia.org/wiki/Hanwha_Techwin

However, if the territory dispute breaks out, Hanwha may have to fight it out with Hyundai's tanks and artillery. Notably, the same Hyundai's division also produces most of South Korea's train cars and locomotives.

https://en.wikipedia.org/wiki/K1_88-Tank, https://en.wikipedia.org/wiki/Hyundai_Rotem, https://en.wikipedia.org/wiki/Hyundai_Wia