What is "yamboree"

The East Texas Yamboree, a four-day event held annually during the third weekend of October in Gilmer, Texas, celebrates the sweet potato (called a "yam" in the United States) as a former cash crop, drawing thousands of tourists to the city for the occasion. The event has been held in Gilmer since 1935. Festivities at the event include the Queen’s Coronation and Pageant, a carnival, two parades, a barn dance, livestock shows and a marching contest.