 Some 2,000 men were to cross the Roya mountain, clear it from Tyrolean troops, and then attack the main camp of the Habsburg army from the side.Another 5,000 men under the command of Count Ulrich von Sax were to advance at the foot of the mountain and then meet the first group, also attacking from the mountain above and behind the "Letzi".Some 1,600 men from the Grisons would stay put to keep the garrison at Feldkirch at bay.