Hanwha Defense USA’s K9 Mobile Howitizer wins US Army’s Tactical Canon Programme Prototype Order: WASHINGTON — Hanwha Defense USA has secured a competitive agreement from the U.S. Army to deliver prototype K9 Mobile Howitzers for the service branch’s Mobile Tactical Cannon program. The award covers an initial delivery of six prototype systems, with an option for an additional 12 units. This milestone marks the company’s first major primary contract directly with the U.S. ground forces.