The World War One: The Air War Crossword Puzzle contains two versions of the puzzle for differentiation. One version has a word bank, the other version does not. The answer key is also included. This puzzle is great as a vocabulary builder, review, or enrichment learning activity for any World War One unit. This puzzle includes 25 words or phrases about people, places, and technology such as: Dogfight, Ace, Spy Basket, Zeppelin, Sopwith Camel, Lafayette Escadrille, Dirigible, Red Baron, Anthony Fokker, Interrupter Gear, etc.