Hundred Days Offensive
Several battles won by the Allied forces in 1918
Visit all 4 battlefields, from Amiens, France to Mons, Belgium
As well as the tour of the battlefields, there is a museum on the Somme battlefiend, and the Museum of the Great War in Meaux, France. The best time of year is between May and November, with nice warm weather and highs in the 70s and lows in the 50s. For more touring, you can call +44 1989 565599 and take tours with In The Footsteps, a company that does tones of tours, on all different wars, etc.