Answer:
The WWI influenced American culture in fashion, films and sports.
The movie The Little American. 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 fashion was almost stagnant as people think that dressing in a simple manner was more important than wearing complex outfits.
In sports the American and the National league were stopped for the 1918 season.
