But the Allies had only fallen back behind the Elbe, and taken up a strong position at Bautzen, on the Spree, about twelve leagues from Dresden, whilst an army under Bülow covered Berlin. No sooner did the Allies fall back to the right bank of the Elbe than Davoust attacked Hamburg on the 9th of May with five thousand men, and vowed vengeance on the city for having admitted the Allies. To their surprise the citizens found themselves defended by a body of Danes, from Altona, who were the allies of France, but had been just then thinking of abandoning Napoleon. But the fate of the battle of Lützen changed their views, and they retired in the evening of that day, leaving Hamburg to the attacks of the French. Bernadotte, not having received the promised reinforcements, did not venture to cover Hamburg. Davoust entered the place like a devil. He shot twelve of the principal citizens, and drove twenty-five thousand of the inhabitants out of the city, pulled down their houses, compelling the most distinguished men of the town to work at this demolition and at raising the materials into fortifications. The people had long been subjected by the French to every possible kind of pillage and indignity; no women, however distinguished, had been allowed to pass the gate without being subjected to the most indecent examinations. But now the fury of the French commander passed all bounds. He levied a contribution of eighteen millions of dollars: and not satisfied with that, he robbed the great Hamburg bank, and declared all his doings to be by orders of the Emperor. Napoleon, reinforced by a number of French, Bavarian, Würtemberg, and Saxon troops, moved off to attack the Allies at Bautzen, on the 19th of May. He had detached Lauriston and Ney towards Berlin to rout Bülow, but they were stopped by Barclay de Tolly and Yorck at Königswartha and at Weissig, and compelled to retreat. On the 21st Ney combined with Napoleon, and they made a united attack on Blucher's position on the fortified heights of Klein and Klein-Bautzen. In this battle German fought against German, the Bavarians against Bavarians, for they took both sides, such was the dislocated state of the nation. It was not till after a long and desperately-fought battle that the Allies were compelled to give ground, and then they retired, without the loss of a single gun, and posted themselves strongly behind the fortress of Schweidnitz, so famous in the campaigns of Frederick of Prussia.