The bishop's reeve in the southern Grisons,
Benedikt Fontana, was forced to leave his seat on the
Fürstenburg at
Burgeis in the Vinschgau. He had called repeatedly to have strong troops sent to interfere with the preparations of the Habsburg army. The Three Leagues finally complied and assembled an army of about 6,300 men at
Zuoz and marched to the
Val Müstair. They knew that their time was running out, because they had news of Maximilian being on his way with reinforcements. But the
Letzi seemed an insurmountable barrier. The Habsburg army numbered some 12,000 men, of which 2,000 manned the fortifications themselves, while another 1,200 covered the flanks. Castle Rotund at
Taufers in front of the barrier was also manned with Habsburg troops, and 200 men guarded the bridge at Marengo behind the
Letzi. The rest of the Habsburg army camped at the villages in the Vinschgau. The
mats, as the soldiers of the Three Leagues were called in
Romansh, decided to split at
Müstair: about 2,000 – 3,000 men led by Wilhelm Ringk and Hans von Lombris were to march over the mountains to bypass the
Letzi on the north and to attack the enemy from behind. Because their route was in full view of Castle Rotund, they took off at night. When they arrived in the morning in the Vinschgau, they were immediately engaged by Habsburg troops, who fled in panic, however, when rumours that they numbered 30,000 made the round. But at the Marengo bridge, their advance was stopped. The fleeing troops, united with the 200 Tyrolian soldiers stationed there, managed to hold the bridge. The other half of the troops of the Three Leagues attacked the fortifications
frontally all the same. But the defense was strong; the
Letzi was equipped with many cannons, and the
mats were driven back several times and suffered heavy losses. The commanders cheered on their soldiers to keep attacking, and threatened to kill them as traitors should they retreat. Their commander Benedikt Fontana fell. A local
flanking maneuver over the mountain slopes south of the barrier finally brought the
mats the victory. Under simultaneous pressure from all sides, the defenders had to give way. The footsoldiers were overwhelmed and fled, and likewise did the knights, as
Pirckheimer reports. They were chased through the Vinschgau and many drowned in the wild mountain rivers. == Aftermath ==