Asked by Lisette Arvizu
                What technology was created at the Second Battle of Ypres that changed the direction of World War I?
            
            
        Answers
                    Answered by
            TRUMP TRAIN 2020
            
    In case anyone is wandering 
Gas Masks were introduced to counteract the use of chlorine gas.
    
Gas Masks were introduced to counteract the use of chlorine gas.
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