The French and Indian War began in 1754 as a conflict between British and French colonists in North America. French forces and their allies relied on guerrilla tactics to fight the colonists, notes "The War That Made America," TV series website. ... Guerrilla warfare is particularly effective for forces that are outnumbered
Most cultures had written tablets, writings, papers, etc that had dates and those were kept somewhere safe so we have it now and authors write them in textbooks that historians read