Neville's so-called spring offensive has already reached a massive scale on the surface. The outstanding French army alone is hundreds of thousands strong, including the British Expeditionary Force, the Balkan Allied Forces, and the Italian Army, bringing the total number of troops dispatched by the Allies to over 3 million.
It's worth noting that this is not long after the battles of Verdun and the River Somme have just ended, and Britain, France, and Germany have already suffered heavy casualties. Being able to deploy such a scale of troops for a new round of battles is already the result of the entire Allied Nations' efforts.
One could say that, except for Russia, which is in a defensive posture, Britain, France, Australasia, and Italy have dispatched considerable-scale armies to participate in this battle.
For this reason, all countries attach great importance to the upcoming battle and even regard it as an opportunity to resolve the war.