Germany’s largest defence contractor, Rheinmetall, has signed a letter of intent to partner with a Croatian company to build remote-controlled military vehicles, Rheinmetall announced on Tuesday. The partner is the technology company DOK-ING, which is based in Zagreb and already develops and sells robotic systems, including mine-clearance vehicles. Approval by the authorities is still pending, according to Rheinmetall. DOK-ING’s name comes for the Croatian words for documentation and engineering. The company’s slogan is, “Don’t send a man to do the job of a machine.” An existing vehicle from t…