Large-scale factory manufacturing began in the 1920s. During the Iran–Iraq War, Iraq bombed many of Iran's petrochemical plants, damaging the large oil refinery at Abadan bringing production to a halt. Reconstruction began in 1988 and production resumed in 1993. In spite of the war, many small factories sprang up to produce import-substitution goods and materials needed by the military.Iran's Defense Industry. Globalsecurity.org. Retrieved February 3, 2011.
