During World War II, the job market in D.C. exploded; between 1940 and 1945, the number of civilians employed by the government almost quadrupled. The Defense Housing Registry, created by the DC government to help these new employees find housing, processed around 10,000 newcomers every month.
The housing market in D.C. was not at all equipped to deal with this influx; construction in the city had slowed during the Great Depression, and halted completely when materials and labor were diverted to the war effort. So what resulted from the overcrowding of Washington?