REMOVE

1. Artillery (Weaponry)
2. Periodical illustrations
3. World War, 1914-1918
4. Library of Congress Prints a …
5. Penfield, Edward
6. 1917

WHAT

1. Airplanes (1)
2. Artillery (Weaponry) (1)
3. Drawings and Watercolors (1)
4. Periodical illustrations (1)
5. World War, 1914-1918 (1)

WHO

1. Library of Congress Print … (1)
2. Penfield, Edward (1)

WHEN

1. 1866-1925 (1)