Second Army (United Kingdom) in the context of "Italian Front (World War I)"

The Battle for Caen (June to August 1944) was a military engagement between the British Second Army and the German Panzergruppe West in the Second World War for control of the city of Caen and its vicinity during the Battle of Normandy. Caen is about 9 mi (14 km) inland from the Calvados coast astride the Orne River and Caen Canal, at the junction of several roads and railways. The communication links made it an important operational objective for both sides. Caen and the area to its south are flatter and more open when compared to the bocage country of western Normandy, and Allied air force commanders wanted the area captured quickly in order to construct airfields to base more aircraft in France proper.

The British 3rd Infantry Division was to seize Caen on D-Day or alternatively, dig in short of the city. Caen, Bayeux and Carentan were not captured on D-Day, and the Allies concentrated on linking the beachheads. British and Canadian forces captured the area of Caen north of the Orne during Operation Charnwood (8–9 July), while the suburbs south of the river were captured by the II Canadian Corps during Operation Atlantic (18–20 July). The fighting was mutually costly, and greatly deprived the Germans of the means to reinforce the western part of the invasion front.

The 21st Army Group was a British headquarters formation formed during the Second World War. It controlled two field armies and other supporting units, consisting primarily of the British Second Army and the First Canadian Army. Established in London during July 1943, under the command of Supreme Headquarters Allied Expeditionary Force (SHAEF), it was assigned to Operation Overlord, the Western Allied invasion of Europe, and was an important Allied force in the European Theatre. At various times during its existence, the 21st Army Group had additional British, Canadian, American, and Polish field armies or corps attached to it. The 21st Army Group operated in Northern France, Luxembourg, Belgium, the Netherlands and Germany from June 1944 until August 1945, when it was renamed the British Army of the Rhine (BAOR).

Operation Plunder was a military operation to cross the Rhine on the night of 23 March 1945, launched by the 21st Army Group under Field Marshal Bernard Montgomery. The crossing of the river was at Rees, Wesel, and south of the river Lippe by the British Second Army under Lieutenant General Miles Dempsey, and the United States Ninth Army under Lieutenant General William H. Simpson.

The Battle of the Rhine was crucial for the Allied advance into Germany, and was planned by Montgomery as a three-army assault, including an airborne assault, a five-thousand-gun artillery barrage, and Anglo-American bombers. Thousands of tons of supplies were brought forward including huge amounts of bridging equipment.

The Battle of Arnhem was fought during the Second World War, as part of the Allied Operation Market Garden. It took place around the Dutch city of Arnhem and vicinity from 17 to 26 September 1944. The Allies had swept through France and Belgium in August 1944, after the Battle of Normandy. Market Garden was proposed by Field Marshal Sir Bernard Montgomery, who favoured a single push northwards over the branches of the Lower Rhine River, allowing the British Second Army to bypass the Siegfried Line and attack the important Ruhr industrial area.

The First Allied Airborne Army was to capture the bridges to secure a route for the Second Army with US, British and Polish airborne troops dropped in the Netherlands along the line of the ground advance, being relieved by the British XXX Corps. Farthest north, the British 1st Airborne Division landed at Arnhem to capture bridges across the Nederrijn (Lower Rhine), with the 1st Polish Parachute Brigade following on. XXX Corps was expected to reach Arnhem in two to three days.