REMOVE

1. Submarines
2. World War, 1914-1918.
3. Library of Congress Prints a …
4. Rogers, W. A.
5. 1854-1931
6. 1915

WHAT

1. Defense industry. (1)
2. Drawings and Watercolors (1)
3. Editorial cartoons (1)
4. Military officers (1)

WHO

1. Library of Congress Print … (1)
2. Rogers, W. A. (1)

WHEN

1. 1915? (1)