In the early 1900s parts of the Cascades were settled by southerners after the depletion of timber in the Cumberlands and Ozarks. What did these mountain communities collectivley become known as?

In the early 1900s, the mountain communities settled by southerners in the Cascades became collectively known as the "Appalachian diaspora." These settlers brought their cultural traditions and practices from the Appalachian region, adapting them to their new environment in the Pacific Northwest. This migration was largely driven by the search for new opportunities after the depletion of timber resources in their home regions.