On the night of 20 January 1944, the
US 36th Infantry Division, under command of
Major General Geoffrey Keyes's
II Corps, fired an artillery barrage of 31,000 rounds on German positions across the
Gari River, which resulted in only negligible damage. Feint attacks were conducted by the
34th Infantry Division to the north, near
Monte Cassino, to divert attention from the main advance. After the barrage, the
141st and the
143rd Infantry Regiments were ordered to cross the river, which began at 19:00. Initial casualties were inflicted on the Allies by landmines on the east bank of the river, although engineers were tasked with clearing approaches to the river. German artillery responding to the American barrage also hit elements of the 141st Regiment before they were able to reach the river. Two
rifle companies of the 143rd successfully crossed the river, but German fire resulted in the loss of too many men and landing boats, and the foothold was abandoned. The 141st fared even worse, withdrawing with heavy casualties after landing directly opposite a German minefield. The next day, both regiments were ordered to perform another attack beginning at 16:00. Although the assault met with more success, the American foothold was still unsustainable, as withering fire from the
15th Panzergrenadier Division prevented the construction of
pontoon and
Bailey bridges by engineers. Without the bridges, armor could not assist in the attack, and the infantry were left to fight on their own, which resulted in devastating casualties for the two regiments. After more than 20 hours of fruitless combat, both were ordered to withdraw. The 143rd was able to withdraw relatively intact, but much of the 141st was left stranded since their bridges and boats had been destroyed by enemy fire. The German defenders mounted a
counterattack against the trapped Americans and captured hundreds of soldiers. Major General
Fred L. Walker decided against committing the division's last regiment, the
142nd Infantry, and the battle concluded at 21:40 on January 22. ==Aftermath==