England and Austria laughed in scorn at the idea of transporting across the Alps, where "no wheel had ever rolled, or by any possibility could roll," an army of sixty thousand men, with ponderous artillery, tons of cannon balls and baggage, and all the bulky munitions of war.

But the besieged Massena was starving in Genoa, and the victorious Austrians thundered at the gates of Nice, and Napoleon was not the man to fail his former comrades in their hour of peril.
When this "impossible" deed was accomplished, some saw that it might have been done long before.

Others excused themselves from encountering such gigantic obstacles by calling them insuperable.

Many a commander had possessed the necessary supplies, tools, and rugged soldiers, but lacked the grit and resolution of Bonaparte, who did not shrink from mere difficulties, however great, but out of his very need made and mastered his opportunity.
Grant at New Orleans had just been seriously injured by a fall from his horse, when he received orders to take command at Chattanooga, so sorely beset by the Confederates that its surrender seemed only a question of a few days; for the hills around were all aglow by night with the camp-fires of the enemy, and supplies had been cut off.
Though in great pain, he immediately gave directions for his removal to the new scene of action.
On transports up the Mississippi, the Ohio, and one of its tributaries; on a litter borne by horses for many miles through the wilderness; and into the city at last on the shoulders of four men, he was taken to Chattanooga.

Things assumed a different aspect immediately.