In Oct 1917, the Aust Light Horse under Gen Harry Chauvel mounted 1 of the most spectacular and last cavalry charges in hist, when they charged Turkish machinegun positions around the key city of Beersheeba in Sinai-Palestine, and captured the famous wells intact before they could be destroyed by German engineers, thereby preserving the survival of Gen Allenby's 60,000-strong Desert Army (who were already suffering from dwindling water supplies) and paving the way for the reconquest of the entire Holy Land from the Ottomans. But WI the LH hadn't succeeded in their attack and the wells were blown ? How significant a setback would the British have experienced with the loss of such vital water supplies ?