Detroit Tanks The Detroit Tank Arsenal in Michigan built more than 22,000 tanks, which was roughly 25% of the nation's tank production during World War II. Here, M3 medium tanks are finished at the Detroit Army Tank Arsenal. Defense Secretary Dr. Mark T. Esper said Sept. 5, 2019, the United States is going to need government, academia and industry to pull together like it did during World War II so that the technology can advance as quickly as what’s needed. SHARE: Download: Full Size (0.07 MB) Credit: Army VIRIN: 191105-A-ZZ999-001C.JPG Photo Gallery