The Battles of WW1 Crossword

This printable crossword puzzle on the topic of World War I has 10 clues. Answers range from 5 to 13 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Where is Ypres
During WW1 which nations created the U-Boat submarines
When planes were first introduced what were they used for?
Machine guns and tanks killed a lot of innocent people in which battle?
The goal of this battle was to recapture a small village in Belgium
In vimy ridge who was the Canadian General
Which battle was considered as "The birth of our nation" for Canadians
This tye of gas was introduced in battle of Ypres
Which battle did trench warfare start in?
In battle of Ypres _ _ _ _ _ _ _ _ warfare was introduced