Which of these things were elements of trenches? Check all that apply.
What was no-man’s-land?
Which factors led to stalemate in the trenches? Check all that apply.
Which statement about submarine use in World War I is true?
During World War I, aircraft were primarily used for .
Which statement best summarizes the impact of machine guns and artillery?
2. World War I trenches were easily defended through the use of .
3. Though not particularly effective during World War I, made trench warfare obsolete.
1. The use of caused more than 1.3 million casualties.
Check any reasons you think make morale important to an army.
How did the United States contribute to the Allied victory? Check all that apply.
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