In 2004, George Cassar called the battle a British tactical success but that the strategic intentions had not been met. Jack Sheldon was less complimentary and wrote that although the attack had shocked the 6th Army, it quickly amended its defensive tactics and that the British had also been shocked that such a carefully planned attack had collapsed after the first day. Sheldon called the British analysis of the battle "bluster" and wrote that Joseph Joffre, the French commander, praised the results of the first day, then dismissed the significance of the attack "" (But it was a success which led to nothing.). The German and French armies began to revise their low opinion of the BEF, the Germans having assumed that the British would remain on the defensive to release French troops and had risked keeping as few troops as possible opposite the British. The German defences were hurriedly strengthened and more troops brought in to garrison them. The French had also expected that the British troops would only release French soldiers from quiet areas and that British participation in French attacks would be a secondary activity. After the battle French commanders made more effort to co-operate with the BEF and plan a combined attack from Arras to Armentières.