The French capital had now been invested for more than four weeks, and it seemed not impossible, because of the long continuance of inactivity, that it might be brought to surrender by famine. All the sorties hitherto attempted had only had for their object to drive the enemy from the closest vicinity; a new effort was to aim at greater results. The project was to cross the Seine below Paris at Bezons and Carrières, and to make a simultaneous attack on the positions of the IVth Prussian Corps on the heights of Argenteuil from the south, and from St.-Denis from the east. A march on Rouen by Pontoise was to follow, into a district not yet altogether exhausted of resources. The Army of the Loire was also to proceed thither by railway by way of Le Mans, and so there would be massed in that region an army of 250,000 men.
The Prussian Vth Corps, it was true, stood right on the flank of such an advance across the Seine; its outposts had several times been seen in Rueil. As a preliminary step, General Ducrot undertook to force back this body with 10,000 men and 120 field-guns. Then an intrenched line from Valérien to Carrières would close the peninsula against interference from the southward.
Perhaps, in the face of much-dreaded "public opinion" and the growing restlessness of political parties in Paris, it was more the urgency to be doing something than any serious hope of success which gave rise to such far-reaching schemes. Considerable difficulties had to be met in attacking the enemy's lines, and greater must inevitably arise if the attack should succeed. It was vain to think of bringing through the miles-long trains which are indispensable for victualling an army. Serious embarrassment would ensue when the troops had consumed the three days' rations they would carry with them. To live on the country the army must disperse itself; but with the enemy at its heels close concentration was indispensable. And, in any case, it is hard to see what would have been gained by withdrawing from Paris the forces which had been assembled for the defence of the capital. Success could only have been hoped for if an army from without had been so near as to be able immediately to give the hand to the troops marching out.