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In page Yom Kippur War:

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The commanders of the Second and Third Armies, Generals Khalil and Wasel, were also dismissed from the army.[1] The commander of the Egyptian Second Army at the start of the war, General Mamoun, suffered a heart attack,[citation needed] or, alternatively, a breakdown, after the Egyptian defeat during the 14 October Sinai tank battle, and was replaced by General Khalil.[4][5]