habitat more closely resembled a tundra, with lower temperatures, numerous conifer trees, and large mammals, such as mammoths and saber-toothed tigers. Eventually, the climate began to warm up again, the large mammals started to disappear, and the vegetation seen more often today began to flourish. These climatic changes made life more sustainable for the Native Americans. They continued to invent new weapons and made advancements in agriculture until the Europeans arrived in North America. European settlement Europeans settled in North America beginning in the seventeenth century. In 1749, Jacob Martin and Steven Sewell were the first Europeans known to settle the Appalachian Plateau, specifically in what is now Pocahontas County in West Virginia. European colonization and competition with the Native Americans resulted in high mortality due to new diseases, as well as more deaths and social disruption due to warfare. After pushing out the Native Americans, the European American settlers developed much of this land for agriculture. From 1861 to 1865, the Appalachian Plateau suffered from the Civil War, but in comparison to many other parts of the country, little damage was done. During the war, Union forces gained control over a majority of the plateau, and afterwards that possession was not challenged. Only three noteworthy battles occurred in the plateau region during the war, so not much of the land was destroyed. After the war, the coal industry boomed. Many counties in the Appalachian Plateau region, such as McDowell County in West Virginia, became dominated by coal mining. Coal mining towns were created, and many immigrants were attracted to the region for work. Although mining was good for the economy, deaths were high in the harsh work of the mines. Among the terrible coal incidents was the Monongah mining disaster of 1907. Protected lands Protecting the Appalachian Region from damage of human influence has been important in the modern era. Conservationists have been fighting to preserve the wildlife in the Appalachia region. The region has proved that with good care, the flora and fauna can be very resilient. However, back in 1890, the destruction of the Appalachian region's forest was at full-scale with the invention of the railroad, saw-mills, and clear-cutting of trees. This caused major flooding and wildfires to the region and destroyed keystone species across the region. Realizing that the destruction of the forest was becoming a major issue, the government passed the Weeks Act of 1911,