Around 900, people from the Mississippi Valley area came here and drove the Woodland Indians away from this region. The Mississippians had a highly complex society based on horticulture. This stratified society was dominated by an elite class of political and religious leaders who occupied principal towns and were largely supported by farming laborers who lived on adjacent agricultural fields. Mounds served as platforms for temples and the principal residences of the leaders, and commoners carried dirt in baskets to form them. Evidence indicates that the mounds were enlarged from time to time, possibly for new structures or newly installed priest-leaders. The community elite were buried in a special cemetery that eventually became the Funeral Mound, a seven-layer mound with numerous elaborate tombs. A plaza, or ball field, stood at the center of each town. Stickball, a forerunner of modern lacrosse, required great strength and endurance, and sometimes two rival towns settled differences through a ball game instead of warfare, giving it the title "Little Brother of War." Chunkey was another game, using a stone disc and sticks or spears; the disc was rolled in a prepared courtyard, and the person whose stick landed closest to the fallen stone won the match.