Important events of 1917 during the fourth and penultimate year of the First World War, including the surprise tank attack by the British (pictured above) at the Battle of Cambrai. 19 Jan The British intercept and decode a telegram from the German Foreign Secretary Arthur Zimmermann to Mexico urging …
https://www.historic-uk.com/HistoryUK/HistoryofBritain/World-War-1-Timeline-1917/

