HUNTSVILLE, Ala. — International demand for the U.S. Army’s Integrated Battle Command System is growing, driven partly by the war in Ukraine, according to manufacturer Northrop Grumman. The Army originally developed IBCS as the brains of a future air and missile defense system. The service intended to link it with a new 360-degree radar and potentially new launchers, replacing the aging Patriot air-and-missile defense system component by component. But in 2018, the Army expanded the planned