In 1936 the US Department of Agriculture began construction on three new communities, known as the Greenbelt Towns. The three towns were Greenbelt, Maryland, Greenhills, Ohio and Greendale, Wisconsin.
This Depression era project was created to demonstrate a new kind of suburban community planning, which would combine the advantages of both city and country life; to provide good housing at reasonable rents for moderate income families and to give jobs to thousands of unemployed workers, which would result in a lasting economic benefit to the community where the work was undertaken.
Supposedly, the homes in Greendale were supposed to have basements and the homes in Greenbelt weren't, but somehow the plans got switched and that's why the Greendale Originals only have crawl spaces, not basements.
UPDATED: New links to information about Greenbelt Communities.
A really facinating UWM report about Greenbelt Towns, titled Greenbelt Towns and The Common Good.
Here is a link to an interesting article about Greenhills, Ohio, just outside of Cinncinnati.
Another facinating article about Greendale, Wisconsin, from San Jose State University in California.
Here is a personal memory of a Greenhills, Ohio resident from 1997.
A website for Greenbelt Homes Inc., in Greenbelt, Maryland.
Here's the official city government site for Greenbelt, Maryland.
A interesting oral history of Greenbelt, Maryland.
A Milwaukee Journal Sentinel article on the Greendale Originals.
Last but not least is the government site for the Village of Greendale, Wisconsin.