American students often get the impression from history classes that the British got here first, settling Jamestown, Va., in 1607. They hear about how white Northerners freed the black slaves, how Asians came in the mid-1800s to build Western railroads. The lessons have left out a lot.

Forty-two years before Jamestown, Spaniards and American Indians lived in St. Augustine, Fla. At least several thousand Latinos and nearly 200,000 black soldiers fought in the Civil War. And Asian-Americans had been living in California and Louisiana since the 1700s.

Now, more of these and other lesser-known facts about American minorities are getting more attention. The main reason is the nation's growing diversity.

More than one in four Americans is not white, and many minority groups are gaining strength - in numbers, political clout and resources - to bring their often-overlooked histories to light.

Minority communities “are yelling for inclusion in the national consciousness,” said Gary Okihiro, a historian at Columbia University. “One needs to understand what's true about the past to be able to make sound judgments about our present.”