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.
You didn't list options, but I'll suggest an item which famously occurred during Warren G. Harding's presidency:
<h2>The Teapot Dome Scandal</h2>
This was a scandal in which one of President Harding's cabinet members illegally leased oil reserves. President Harding was not directly implicated in the scandal, but was affected by it. After President Harding transferred supervision of the naval oil-reserve lands from the navy to the Department of the Interior in 1921, Secretary of the Interior Albert Bacon Fall secretly gave Harry Sinclair of the Mammoth Oil Company exclusive rights to the Teapot Dome reserves in Wyoming. He granted a similar deal to another oil company executive. The secret leases came under Congressional investigation. Congress directed President Harding to cancel the leases, and the Supreme Court ruled that Harding's transfer of authority to Interior Secretary Fall had been illegal. The whole affair took a toll on President Harding's health. He died in office in 1923.
