Analysis of information sources in references of the Wikipedia article "Burying the hatchet" in English language version.
Great Tree of Peace (early 1400s) (Noted in P.L. 110-82 as "Iroquois Confederacy")...The Peacemaker sealed the treaty by symbolically burying weapons at the foot of a Great White Pine, or Great Tree of Peace, whose 5-needle clusters stood for the original 5 nations: Mohawk, Oneida, Onondaga, Cayuga and Seneca. The Hiawatha Belt is a visual record of the creation of the Haudenosaunee dating back to the early 1400s, with 5 symbols representing the 5 original Nations.