英文を日本語訳して下さい。
The British reached Mons on 22 August. On that day, the French Fifth Army, located on the right of the BEF, was heavily engaged with the German 2nd and 3rd armies at the Battle of Charleroi. At the request of the Fifth Army commander, General Charles Lanrezac, the BEF commander, Field Marshal Sir John French, agreed to hold the line of the Condé–Mons–Charleroi Canal for twenty-four hours, to prevent the advancing German 1st Army from threatening the French left flank. The British thus spent the day digging in along the canal.
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