WWI implemented trench warfare. Instead of everyone standing in a line people got down in trenches and fought each other. They would stay in these trenches for extended periods of time. The trenches were usually dirty and crowded.
I think d not shure if wrong soooo sorry
The result was the united States and Japan became Allies and Trading Partners.
After the world war II, Japan's economy was on the brink of destruction ( because the allied forces forced Japan to compensate the loss from the war) so the Trades were basically consist of Essential Foods and Raw Materials
Japan's military also being dismantled by the united states at that time
