Numerous old river valleys and furrows entrenched in.
But hearing of his misfortune they retreated before Napoleon's advance along the right bank of the Danube to Krems, where they crossed the river and withdrew to an entrenched camp near Olmi tz to pick up fresh Austrian reinforcements.
On the 29th the force advanced towards Tokar in square, and came under fire at 11.20 AM, from the enemy entrenched at El Teb.
The battle of Borodino was not fought on a chosen and entrenched position with forces only slightly weaker than those of the enemy, but, as a result of the loss of the Shevardino Redoubt, the Russians fought the battle of Borodino on an open and almost unentrenched position, with forces only half as numerous as the French; that is to say, under conditions in which it was not merely unthinkable to fight for ten hours and secure an indecisive result, but unthinkable to keep an army even from complete disintegration and flight.
The defences, of the Spanish frontier consist of the entrenched camps of Bayonne and Perpignan and the various small forts darrt of the Pyrenees.