World War I Crossword Puzzle

This printable crossword puzzle on the topic of World War I has 15 clues. Answers range from 6 to 20 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Name of the Archduke who was assassinated that started WWI?
Allies vs...
Led to development of new machinery and weapons
Empires want to expand
American passenger vessel attacked by German U-Boats
Telegram sent by Author Zimmerman to Mexico proposing an alliance
United States enters the war
Central powers agree to stop fighting
Allies= Russia, France and...
Central Powers= Austria-Hungary, Ottoman Empire and...
Buildup of weapons during times of peace
World War I is also known as...
WWI began on
WWI ended on
President during WWI