Siborne speculates that if he had instead headed for General Rapp and his V Corps ("Armée du Rhin") cantoned near Strasbourg, and called on General Lecourbe to bring his I Corps of Observation ("Armée du Jura") based at Belfort, to his aid this would form thae nuclease of a new army to which he could summon all the reserves that he could possibly collect together, including the Regimental Depots, the "Gensd' armerie" and even "Douancric". With this force he could have attacked the flanks of the victorious armies of Wellington and Blücher, during their hazardous advance upon Paris; and, in combination with Soult and Grouchy, to effect the allies separation, and perhaps their destruction. On 23 June, Wellington and Blücher gave to the great mass of their troops a halt; not merely for the sake of affording them rest, but also for the purpose of collecting the stragglers, and bringing up the ammunition and the baggage. The only movement made on the part of the Anglo-allied army, was that by Major General Lyon's 6th Hanoverian Brigade, which, together with Grant's Hussar Brigade, Lieutenant Colonel Webber-Smith's Horse Battery, Major Unett's and Major Brome's foot batteries, marched, under the personal command of Sir Charles Colville, to attack Cambrai, the garrison of which, Wellington had been led to believe, had abandoned the place, leaving in it at most 300 or 400 men. Colville was furnished with a letter from Wellington to the Governor, summoning him to surrender; as also with some copies of Wellington's Proclamation of 22 June to the French. The 1st Brunswick Light Battalion was sent forward from the reserve at Bavay, to watch Le Quesnoy; the fortress of which was still occupied by the French. The Prussian III Corps was pushed forward to Avesnes, by which means the three Prussian Corps destined to advance upon Paris were so placed that they could form a junction, with only half a day's ordinary march; and this relative position was maintained throughout the remainder of the line of advance. The Coalition Commanders met at Catillon, for the purpose of arranging their plan of combined operations. The intelligence they had procured having satisfied them that the French was collecting their forces at Laou and Soissons: they decided upon not pursuing them along that line, since their own progress towards the capital might, in that case, be impeded by affairs of advanced and rearguards; but upon moving by the right bank of the Oise, and crossing this river at either Compiègne or Pont-Sainte-Maxence.