General of Division Jean-Charles Pichegru commanded the Army of the North which held the frontier from Dunkirk on the west, through Lille, Douai and Cambrai to Maubeuge on the east. The Army of the Ardennes was posted on its right. The French armies were more numerous but lacked the discipline of the Coalition armies. Lazare Carnot drew up the French strategic plan which was to attack on the two flanks, a "pet theory" of his. Meanwhile, the Coalition armies under Austrian Feldmarschall Prince Josias of Saxe-Coburg-Saalfeld struck in the center with 85,000 soldiers. After repelling two fumbling attempts at relief, Coburg successfully concluded the Siege of Landrecies on 30 April 1794. Meanwhile, Pichegru's forces drove back Feldzeugmeister François Sébastien Charles Joseph de Croix, Count of Clerfayt's corps on the west flank, in the area of Kortrijk (Courtrai) and Menen (Menin) at the end of April and early May. On the east flank, Pichegru simplified his command problems in mid-April by placing three divisions between Cambrai and Maubeuge under General of Division Jacques Ferrand. A few weeks later, the French started attacking the line of the Sambre River, but were beaten on 13 and 24 May. These were the battles of Grandreng and Erquelinnes.