The United States government owns 47 percent of all land in the West. In some states, including Oregon, Utah and Nevada, the majority of land is owned by the federal government. Of course, it used to own nearly all of it.

And that remaining ownership and management of large tracts of forest and grazing lands is the core of the problem for antigovernment protesters in Oregon. They have taken over a federal building, the latest in a long history of fights between the government and Western settlers about how the lands should be used.

How did the federal government get the land?

The history of federal land ownership has been largely one of divestiture and public use, not acquisition. As the United States expanded across the continent, it did so by purchasing or taking the land that became new states. (Among the groups it took land from were Native Americans.)

Over time, it transferred land to state governments and individuals, largely through homesteading and land grants, which allowed farmers to procure parcels of land for agricultural use. The government also tended to allow free use of unclaimed lands by ranchers and others, though there were skirmishes over the years when settlers tried to fence in public land or claimed land in Indian territories.