Siege of Tobruk in the context of "Crusader tank"

The Eighth Army was a field army of the British Army during the Second World War. It was formed as the Western Army on 10 September 1941, in Egypt, before being renamed the Army of the Nile and then the Eighth Army on 26 September. It was created to better control the growing Allied force based in Egypt and to direct its efforts to lift the siege of Tobruk via Operation Crusader.

It later directed Allied forces through the remaining engagements of the Western Desert campaign, oversaw part of the Allied effort during the Tunisian campaign and finally led troops throughout the Italian campaign. During 1943, it made up part of the 18th Army Group before being assigned to the 15th Army Group (later, the Allied Armies in Italy).

The Western Desert campaign (Desert War) took place in the deserts of Egypt and Libya and was the main theatre in the North African campaign of the Second World War. Military operations began in June 1940 with the Italian declaration of war and the Italian invasion of Egypt from Libya in September. Operation Compass, a five-day raid by the British in December 1940, was so successful that it led to the destruction of the Italian 10th Army (10ª Armata) over the following two months. Benito Mussolini sought help from Adolf Hitler, who sent a small German force to Tripoli under Directive 22 (11 January). The Afrika Korps (Generalleutnant Erwin Rommel) was formally under Italian command, as Italy was the main Axis power in the Mediterranean and North Africa.

In the spring of 1941, Rommel led Operation Sonnenblume, which pushed the Allies back to Egypt except for the siege of Tobruk at the port. At the end of 1941, Axis forces were defeated in Operation Crusader and retired again to El Agheila. In early 1942 Axis forces drove the Allies back again, then captured Tobruk after the Battle of Gazala but failed to destroy their opponents. The Axis invaded Egypt and the Allies retreated to El Alamein, where the Eighth Army fought two defensive battles, then defeated the Axis forces in the Second Battle of El Alamein in October 1942. The Eighth Army drove Axis forces out of Libya to Tunisia, which was invaded from the west by the Allied First Army in Operation Torch. In the Tunisian campaign the remaining Axis forces surrendered to the combined Allied forces in May 1943.

Operation Crusader (18 November – 30 December 1941) was a military operation of the Western Desert campaign during World War II by the British Eighth Army (with Commonwealth, Indian and Allied contingents) against the Axis forces (German and Italian) in North Africa commanded by Generalleutnant (Lieutenant-General) Erwin Rommel. The operation was intended to bypass Axis defences on the Egyptian–Libyan frontier, defeat the Axis armoured forces near Tobruk, raise the Siege of Tobruk and re-occupy Cyrenaica.

On 18 November 1941, the Eighth Army began a surprise attack. From 18 to 22 November, the dispersal of British armoured units led to them suffering 530 tank losses and inflicting Axis losses of about 100 tanks. On 23 November, the 5th South African Brigade was destroyed at Sidi Rezegh but caused many German tank losses. On 24 November Rommel ordered the "dash to the wire" and caused chaos in the British rear but allowed the British armoured forces to recover. On 27 November, the New Zealanders reached the Tobruk garrison and ended the siege.