Now the U.S. military could need about three years — and possibly longer — to restock its inventory of Patriot and Terminal High Altitude Area Defense, or THAAD, missiles to pre-war levels, experts told Task & Purpose. As things now stand, the inventory of Patriot missiles may have fallen from 2,330 to between 759 and 827 missiles, according to the CSIS analysis. The U.S. military’s arsenal of THAAD missiles may have also decreased from 452 to between 234 and 278. On Wednesday, the Army awarded Lockheed Martin a nearly $54 billion contract modification as part of a seven-year agreement to build Patriot missiles. Lockheed Martin also received a nearly $35 billion contract in June to quadruple THAAD production over the next seven years.