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

The Battle of Amiens was a significant turning point in the First World War where the Allies achieved a decisive victory over Germany. The battle demonstrated the effectiveness of combined arms warfare and the importance of surprise attacks. It also showed how the German military leadership had become disconnected from reality and was unable to adapt to changing circumstances. Despite achieving the destruction of the British Fifth Army as a by-product, the German Army never succeeded in its main purpose during the first few days of its furious forty-mile advance when the British and French Commanders-in-Chief were each struggling with their separate and abundant problems. Field-Marshal Haig saw the paramount danger first and it was on his initiative that General Foch was appointed to the Allied Supreme Command on March 26th. From this moment, it was certain that German strategy would be countered but there remained the possibility that tactical advantages would give them the victory they sought. In the fluid conditions of the Somme front, with the Allies intermixed, and the British units dangerously weak and tired, German chances were still good. They made their attempt on April 24th; the capture of Villers Bretonneux for