Several bridges on the way could not deal with the load and gave way.
Each soldier carried his own four day's rations but unfortunately these rations were all consumed during the first day due to lack of discipline. The road did not offer any source of nutrition for the starving soldiers in the march. The wells had been polluted by dead horses thrown in by the Russians. The cattle had a hard time keeping up with the army's march since the animals were not used to marching for 15 miles for 6 to seven hours.
The immense heat following the relentless rainstorms dried up the tracks but soon turned the muddy roads into clouds of dust which also hindered the army.
Vilna was captured on June 28 1812. Unfortunately Vilna provided little for the army's needs. Vilna's stores and houses had been destroyed by the Russians abandoning the town. The rest of the stores were exhausted within the first day. Napoleon remained in Vilna far too long(28 June to 16 July.)