The construction of Levittown — a community of inexpensive, subsidized homes intended for G.I.s returning from WWII — marked the largest planned community project at the time and stands as an identifier for the suburbanization of America. Built using an efficient process akin to assembly lines, Levittown combined economics of scale and efficiency that produced a community of 17,000+ homes from 1947 to 1951 on Long Island.