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D-Day and Normandy ยท permanent subject timeline

Harry Crerar

Commander of the First Canadian Army. This page combines historical context with 27 matching records drawn directly from the World History Database Normandy archive.

27 matching archive records1944โ€“1944 record spanOpen full 455-record archive

Historical context

Harry Crerar: overview and significance

What happened?

Harry Crerar commanded the First Canadian Army as it became operational in Normandy. Canadian formations played a major role in the battles south of Caen and toward Falaise.

Why was it important?

Crerar's army became responsible for a critical part of the Allied effort to close the Falaise gap and destroy German forces retreating from Normandy.

World History Database records

Harry Crerar timeline

The records below are selected from the 455-record D-Day and Normandy archive and rendered as static HTML in chronological order.

1944
1944 23rd July

First Canadian Army

Commander of First Canadian Army Henry Duncan Graham Crerar ยท Canada ยท Caen ยท World War, 2nd

Crerar's First Canadian Army became operational and assumed responsibility for the Allied sector around Caen.

1944 7th August

Operation Totalize

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท World War, 2nd

Commands an encirclement of the German Army Group B in the Caen sector

1944 10th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

By August 10, Canadian troops had reached Hill 195, north of Falaise

1944 10th August

Wehrmacht

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

The Canadian Armys offensive stalled on August 9, with strong Wehrmacht counterattacks resulting in heavy casualties for the Canadian and Polish armoured and infantry divisions

1944 11th August

Operation Totalize

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Caen ยท World War, 2nd

Operation Totalize is abandoned after failure to advance along the Caen-Falaise Road

1944 14th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Many of the bombers mistakenly dropped short of their targets, causing 400 Polish and Canadian casualties.

1944 14th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Operation Tractable began at 12:00 on August 14 when 800 Lancaster and Halifax bombers struck German positions along the front.

1944 14th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

The Canadians attempt to encircle the 5th Panzer, 7th Army & Panzer Gruppe Eberbach.

1944 14th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Throughout the day, continual attacks by the 4th Canadian and Polish 1st Armoured Divisions managed to force a crossing of the Laison River.

1944 14th August

Operation Tractable

Commander of First Canadian Army Henry Duncan Graham Crerar ยท Canada ยท Caen ยท World War, 2nd

Crerar's army continued the advance from the Caen sector toward Falaise and Trun.

1944 15th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Although the first days progress was slower than expected, Operation Tractable resumed on August 15; both armoured divisions pushed southeast towards Falaise

1944 16th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

The drive for Trun by Polish and Canadian Armoured Divisions began on August 16, with preliminary attacks in preparation for an assault against Trun and Chambois. The 2nd Canadian Infantry Division break into Falaise, encountering minor opposition from Waffen SS units and scattered pockets of German infantry

1944 19th August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Novel tactics by Polish 1st Armoured Division, under the command of Stanislaw Maczek during the drive for Chambois, enabled the Falaise Gap to be partially closed by August 19, 1944, trapping about 150,000 German soldiers in the Falaise Pocket

1944 21st August

Falaise Gap

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Surrender and capture of the remaining units of the German 7th Army which were trapped in the Falaise Pocket. Elements of the First Canadian Army relieved the Polish Armys survivors of this Battle and the Canadian Army was finally able to close the Falaise Pocket by linking up with the troops of the American 3rd Army on the other side

1944 21st August

Operation Totalize

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

General Harry Crerar, commanding the newly formed First Canadian Army and Lieutenant General Guy Simonds of the II Canadian Corps, planned an Anglo-Canadian offensive with the code name of Operation Totalize

1944 21st August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Surrender and capture of the remaining units of the German 7th Army which were trapped in the Falaise Pocket. Elements of the First Canadian Army relieved the Polish Armys survivors of this Battle and the Canadian Army was finally able to close the Falaise Pocket by linking up with the troops of the American 3rd Army on the other side

1944 21st August

Seventh Army

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Surrender and capture of the remaining units of the German 7th Army which were trapped in the Falaise Pocket

1944 21st August

Third Army

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

Elements of the First Canadian Army relieved the Polish Armys survivors of this Battle and the Canadian Army was finally able to close the Falaise Pocket by linking up with the troops of the American 3rd Army on the other side

1944 August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

This record states: And it was a part of the largest encirclement on the German Western Front during World War II.

1944 August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

This record states: Operation Tractable is the final offensive conducted by Canadian Army and Polish Army troops as part of the Battle of Normandy.

1944 August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

This record states: The goal of operation Totalize is to capture the strategically important French town of Falaise, and following that, the smaller towns of Trun and Chambois.

1944 August

Operation Tractable

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

This record states: This operation was undertaken by the Polish 1st Armoured Division and the First Canadian Army against the Wehrmachts Army Group B.

1944 August

Siege of Chambois

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Chambois ยท World War, 2nd

The goal of operation Totalize is to capture the strategically important French town of Falaise, and following that, the smaller towns of Trun and Chambois

1944 August

Siege of Falaise

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

The goal of operation Totalize is to capture the strategically important French town of Falaise, and following that, the smaller towns of Trun and Chambois

1944 August

Siege of Trun

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Trun ยท World War, 2nd

The goal of operation Totalize is to capture the strategically important French town of Falaise, and following that, the smaller towns of Trun and Chambois

1944 August

Wehrmacht

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

This operation was undertaken by the Polish 1st Armoured Division and the First Canadian Army against the Wehrmachts Army Group B, and it was a part of the largest encirclement on the German Western Front during World War II

1944 August

Western Front

Commander of First Army Henry Duncan Graham Crerar ยท Canada ยท Falaise ยท World War, 2nd

This operation was undertaken by the Polish 1st Armoured Division and the First Canadian Army against the Wehrmachts Army Group B, and it was a part of the largest encirclement on the German Western Front during World War II

Editorial provenance

Sources and editorial review

Compiled and edited by World History Database.

Historical context is editorial material; the chronology is generated from World History Database D-Day and Normandy records.

Last reviewed: September 2026.

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