I'm trying to summarize https://www.historytoday.com/archive/battle-amiens, but I'm not sure. Here's my try:

was a brilliant success, but the following day the Australians recaptured it and the Germans were driven back in confusion. The battle had been fought to a standstill and the Allied Commanders-in-Chief were able to concentrate their reserves for the counter-attack which began on August 8th.