A childhood belief about songs

As a child, I was for a long time perplexed by the reference to "the land of the free and the home of the brave" in the last line of the U.S. national anthem (The Srar Spangled Banner). I thought it referred to two separate parts of the U.S. I tried for awhile drawing maps, coloring states two separate colors, trying to figure out correctly which states made up the land of the free and which ones made up the home of the brave.