Initial drive for Falaise Operation Tractable began at 12:00 on 14 August, when 800
Avro Lancaster and
Handley Page Halifax heavy bombers of
RAF Bomber Command struck German positions along the front. By the end of the first day, elements of the Canadian 3rd and 4th divisions had reached Point 159, directly north of Falaise, although they had been unable to break into the town. To bolster his offensive, Simonds ordered the
Canadian 2nd Infantry Division to move toward the front, with the hope that this reinforcement would be sufficient to enable his divisions to capture the town. Although the first day's progress was slower than expected, Operation Tractable resumed on 15 August; both armoured divisions pushed southeast toward Falaise. The Canadian 2nd and 3rd infantry divisions—with the support of the
Canadian 2nd Armoured Brigade—continued their drive south towards the town. On 16 August, the Canadian 2nd Infantry Division broke into Falaise, encountering minor opposition from units and scattered pockets of German infantry.
Stanisław Maczek—the Polish divisional commander—split his forces into three battlegroups each of an armoured regiment and an infantry battalion. One of these struck southwest, cutting off Trun and establishing itself on the high ground dominating the town and the Dives river valley, allowing for a powerful assault by the Canadian 4th Armoured Division on Trun. The town was liberated on the morning of 18 August. As Canadian and Polish forces liberated Trun, Maczek's second armoured battlegroup manoeuvred southeast, capturing
Champeaux and anchoring future attacks against Chambois across a front. With reinforcements quickly arriving from the 4th Canadian 4th Armoured Division, Maczek was in an ideal position to close the gap the following day. The presence of the Polish Armoured Division also alerted
Generalfeldmarshall Walther Model of the need to keep the pocket open. By early afternoon, Battlegroup Stefanowicz had captured the hill, annihilating a German infantry company in the process. Polish casualties accounted for nearly 50 per cent of those sustained by the 1st Canadian Army. By late afternoon of 19 August, Canadian and Polish forces had linked with the US
80th US Division and
90th US Division already in the town. The Falaise Gap had been closed, trapping Model's forces. As the link occurred, the II SS Panzer Corps had begun its counterattack against Polish forces on Hill 262, to reopen the pocket. At the same time, the
16th Infantry Division and the 12th SS Panzer Division attacked American and Canadian forces from within the pocket, opening small channels through Allied positions. By mid-morning, 2,000 survivors of the German
2nd Parachute Division had managed to breach Canadian positions along the Dives River and at Point 117. Around noon, several units of the
10th SS Panzer Division Frundsberg, 12th SS Panzer Division and the 116th Panzer Division managed to break through these weakened positions. By mid-afternoon, reinforcements from an armoured battlegroup formed from the
South Alberta Regiment and the
Argyll and Sutherland Highlanders of Canada under Major
David Vivian Currie managed to reach
St. Lambert-sur-Dives. Over the next 36 hours, the battlegroup repulsed almost continual attacks by German forces, destroying seven German tanks, twelve anti-tank guns and forty vehicles. Currie's battlegroup was able to inflict nearly 2,000 casualties on the German forces, including 300 killed and 1,100 captured. By the evening of 20 August, the Germans had exhausted their attack against St. Lambert-sur-Dives; the surviving members of the
LXXXIV Corps (General
Otto Elfeldt) surrendered to Canadian and American forces near Chambois. Directly southwest of Mont Ormel, German units moved along the road as the Poles inflicted heavy casualties on German forces moving towards Mont Ormel with a well-coordinated artillery barrage. Sévigny's assistance was crucial in defending Hill 262 and he later received the
Virtuti Militari (Poland's highest military decoration) for his exertions during the battle. From the northeast, the 2nd SS Panzer Division planned an attack against the four infantry battalions and two armoured regiments of the 1st Polish Armoured Division dug in on Hill 262. The first attack against Polish positions was by the "Der Führer Regiment" of the 2nd SS Panzer Division. The
Podhale Rifles battalion was able to repel the attack but used much of its ammunition in doing so. The second attack was devastating to the dwindling armoured forces of the Polish battlegroups. A German tank, positioned on Point 239 (northeast of Mont Ormel), was able to destroy five
Sherman tanks within two minutes. As the assault from the southwest ran out of momentum, the 2nd SS Panzer Division resumed its attack on the northeast of the ridge. Since Polish units were now concentrated on the southern edges of the position, the 2nd SS Panzer Division was able to force a path through to the 3rd Parachute Division by noon, opening a gap in the pocket.
Generaloberst Paul Hausser, commander of the 7th Army, ordered the positions to be "eliminated".
21 August Night was welcomed by the German and Polish forces surrounding Mont Ormel. Fighting was sporadic, as both sides avoided contact with one another. Frequent Polish artillery barrages interrupted German attempts to retreat from the sector. As the remaining Polish forces repelled the assault, their tanks used the last of their ammunition. The Falaise Gap had been closed, with a large number of German forces still trapped inside. ==Aftermath==