During Suvorov's Swiss campaign, Rosenberg's column took the Oberalp Pass around Lake Oberalpsee; while in independent command,[f] he and his rearguard badly defeated a French force under André Masséna in the Battle of the Muotatal (Muottental/Muttental) on 30 September – 1 October 1799.

During his corps' passage across Habsburg territory, Rosenberg kept strict discipline among his soldiers while ensuring that his hosts kept up their end of the bargain with regard to providing his men with food and living quarters.

The troops made their first overnight stay, from 22 to 23 September, on a snowy ridge, in a cold stormy night, at an altitude of 8,000 feet, without kindling to build bivouac fires; the packs all fell behind.

At dawn on the 23rd Rosenberg first climbed the steep ascent to the snowy ridge, then descended into the gorge of the Reuss, and along it reached Disentis, where he saw a spacious valley; the troops, continuing on their way, arrived at the lodging by midnight, having travelled in three days about 80 km; there were almost no stragglers: those who were exhausted were supported by their comrades.

The position from Italy's side was unavailable: there was a narrow path leading to it, barely suitable for packs, on a steep, winding slope, crossed more than once by mountain streams.

It was necessary to descend into the Reuss River's gorge, to cross the turbulent stream, waist-deep in water, then to climb up to the left bank's mountain heights and to appear in the French rear.

Emperor Paul appointed Rosenberg (20 June 1800) military governor of Kamenets-Podolsky, troop inspector of the Dnieper Inspection and chief of the Vladimir Musketeer Regiment.