Westward Expansion Tools A B neutral not taking sides in an argument or war prairie rolling plains covered with tall grass pioneer first person to lead the way in an unknown area Trail of Tears Cherokee route to the west after 1830 War Hawks Congressmen who pushed for war in 1812 Sequoyah invented Cherokee alphabet Benjamin Banneker survey or lay out Washington DC Osceola Seminole who fought for Indian Removal Daniel Boone pathfinder of the frontier Thomas Jefferson President at the time of the Louisiana Purchase Sacajawea Shoshone who helped Lewis and Clark Francis Scott Key writer of The Star Spangled Banner Lewis and Clark led a fact finding expedition through Louisiana Territory James Monroe bought Louisiana Territory from the French