Apple's biggest smartphone competitor also makes tanks, self-propelled howitzers, and jet engines.

Billed as promoting peace and stability, Samsung Techwin is the South Korean manufacturer's defense branch. It makes surveillance, aeronautics, automation, and weapons technology. Since its launch into the defense industry in 1983, Samsung Techwin has developed and produced artillery systems like the 155mm self-propelled Howitzer M109A2, K9 Thunder, K10 ammunition resupply vehicle, fire directions center vehicles, amphibious assault vehicles and other weapons, according to Samsung.

Samsung Techwin's flagship K9 is currently used by Poland, Turkey, and South Korea. Watch its impressive agility at 3:40 in the video below. The K9 becomes even more impressive when combined with the K10 ammunition resupply vehicle (5:00). The K10 pulls up behind the K9 and automatically feeds more ammunition into the K9, eliminating the need of resupplying the vehicle by hand, which minimizes the risk of troop exposure. Together they create an automated weapons system for the field.

Photo: YouTube screen grab

Samsung Techwin is just one subsidiary of the 80 businesses Samsung is involved in.

Here's a video of Samsung Techwin's defense program: