Answer:
It parallels the work done by civilians with the efforts of soldiers.
Explanation:
The poster shows that civilians' work is as important as the battle efforts of soliders. This is why the working man is shown beside the soldier, with a riveting gun being the civilian analogy of the rifle gun.
In World War I, the effects of the industiral revolution were fully felt, and the efforts of workers in factories were crucial for the victory. It was a war based on industrial power because it required large numbers of powerful and sophisticated equipment that was fabricated in the factories.
