Answer:
The WWI influenced American culture in fashion, films and sports.
The movie <u><em>The Little American.</em></u> Set explicitly in WWI, popular movie star Mary Pickford played an American nurse serving in France who fell in love with two men: a French soldier and a German soldier.
The<u><em> fashion was almost stagnant </em></u>as people think that dressing in a simple manner was more important than wearing complex outfits.
In sports the <u><em>American and the National league</em></u> were stopped for the 1918 season.