May 1 to 16 - Magdeburg Campaign
The Prussian army crossed the river Elbe and won the battle of Calbe on 5 May. Two days later they won again at Colbitz. They were now firmly established on the west bank. On 10 May the French were again defeated at Halbeck.
The Prussians now turned their attention to Magdeburg. As they approached the city the French withdrew, and moved north. The Prussians were thrown into confusion at this unexpected move, and were completely unprepared for the French major attack at Magdeburg. The result was a French victory. The Prussians held Magdeburg, but had to retire across the river Elbe.
The campaign ended with a limited Prussian victory. They had taken, and held, Magdeburg. But they had failed to secure the line of the river Elbe, and the French were now concentrated and in position to oppose any crossing of the river.
May 14 to 7 June - Tarragona Campaign
Marshal Suchet controls the coastal area of north east Spain from the French border to Tarragona.
To prevent him from sending support to Marshal Soult at Burgos, he has ordered Captain-General Copons to create a disturbance. The Spanish occupy Lerida in the north to lure a French army into the mountains. They then lay siege to Tarragona.
The French are held at Reus and retreat into the city. The siege is soon raised at Prades. The French concentrate and cut the Spanish army in half at first battle of Cambrils, but fail to crush the whole army at the second battle of Cambrils.
The French then have to retire to Barcelona to keep their communications with Spain open, and the Spanish again surround their garrisons at Lerida and Tarragona.
The French have failed to destroy the Spanish, and the latter have achieved their campaign objectives of containing all of the French forces in eastern Spain.
May 17 to 13 June - Halle Campaign
Marshal Kutuzov is resting his army at Dresden after the horrors of the 1812 campaign. However Blucher, at Magdeburg, is insisting that he bring his army forward to protect the Prussian flank. He reluctantly agrees to do so.
Napoleon is busy at Fulda building his new Grand Armee, so the river Saale is only thinly held by the French. Kutuzov has easy early success, and eventually manages to cross the river at Halle. However in the final battle of the campaign Napoleon pushes him back over the river and back towards Leipzig.
Napoleon has managed to hold the river line, but not to defeat the Russian army. Kutuzov has therefore managed to secure the Prussian flank and the allies hold a firm line from Magdeburg to Dresden.