“The new United States was a long, thin country …” 1950s animated patriotic film!

A narrow strip along the coast. The new United States was a long thin country with an unplumbed continent at her back. But then that driving urge came welling up. In the heavy air of freedom it could not be contained. Beyond the old frontier there was a world of flat topsoil waiting for the plow. Under the rolling bulge of the land laid deep layers of minerals. Forests of lumber. The people filled their lungs with the air of freedom and went to work. To do the job they had the strength of their backs. The strength of their backs. The muscles of their animals. And the force of falling water. Water power to turn the gristmills, to run the saws and the looms.