Historically, 1917 was a year of major German defensive operations on the Western Front.
By this time, Russia on the Eastern Front would have already been assigned a temporary gender and undergone gender reassignment surgery, whether circumcision or castration, and before Russia's surgery was complete, the Anglo-French Alliance would have tried to drive out Germany.
Looking at Germany's two-front war situation, they were launching a final offensive to cut off Russia's lifeline in the east while maintaining a defensive position in the west at the cost of casualties.
The last golden time was created as the Russian Empire's lifeline was cut off.
To not miss this golden time, the GPN and BEF forces were increased to their largest size ever, and almost all battles began with Anglo-French offensives.