Though Lanchester's Law enabling numerical power comparison due to force differences wasn't yet known to the world.
Roman had long realized that to destroy trench warfare, one must open an extreme war of attrition, and numerical superiority is the basic foundation in this war of attrition.
While trenches are defensive positions where it's difficult to utilize numerical superiority like siege warfare, ironically since these trenches aren't stubborn fortresses, they can be finished in one breath if troops are surely poured in.
Hindenburg too, though not as much as Roman, was someone who understood the principles of this war of attrition through repeated battles.
However, on the Western Front, at Verdun.
Here, no one yet understood even the concept of war of attrition.
"So that's why those Tatar bastards bet their lives on heavy artillery. Annihilating before infantry can arrive. Schmidt, isn't this tremendous sight amazing?"