Crossing the Alps
Donald J. Macdonald.
Clan Donald Magazine No 4 (1968) Online
"Another crossing almost as celebrated [as Hannibal's] was that of Napoleon himself in May of the same year as the one we are considering now. He crossed the Great St. Bernard Pass. Few seem to have heard, or at least to have given due credit, to the crossing made by Marshal Macdonald, Duke of Tarentum, in November of 1800...."
https://www.clandonald.org.uk/cdm04/cdm04a15.htm
From A Military Hisory and Atlas of the Napoleonic Wars by Vincent J Esposito and John R Elting, Map 44, published by Praeger in 1964:
'Macdonald, by sheer courage and force of character, brought 7,000 men through Splugen Pass, despite snow storms and avalanches. Reaching Lake Como on 12 December, he found Austrian fortifications blocking the passes eastward to Trent. Undaunted, he worked across the mountains, captured Trent, and called the troops he had left in Switzerland south through Botzen. Though one entrapped Austrian commander (Laudon) escaped through energetic lying (telling Moncey, sent northward to meet Macdonald, that an armistice had been signed) and a second was saved by the actual armistice, Macdonald's campaign remains a model of personal leadership and mountain warfare.'
Macdonald was commanding the French Army of the Grisons.