Steve Trimble answers: It is fair to say that the U.S. Army is on a missile-buying spree. Since the signing of the Intermediate-Range Nuclear Forces Treaty in December 1987, the service’s missile inventory had been limited to the 300-km (186-mi.) range of the MGM-140 Army Tactical Missile System and 70-km range of the M-270 Multiple Launch Rocket System. But the U.S. and Russia withdrew from the treaty on Aug. 2, 2019, freeing the Army to fill the gap in its arsenal for ground-launched ballistic and cruise missiles with conventional warheads and ranges between 500-5,000 km. The baseline version of the Lockheed Martin Precision Strike Missile will enter service in two years with a range of 499 km, but a follow-on version due to be ready in 2025 is expected to have a range up to 800 km. Moreover, the Army has selected the Raytheon SM-6 ballistic missile and UGM-109 Tomahawk cruise missile for a new ground-launched role, with ground-launched prototypes scheduled to debut in 2023. At the same time, Lockheed should be fielding the first Long-Range Hypersonic Weapon, a rocket-booster glider with a conventional warhead.