Operation Sonnenblume (Unternehmen Sonnenblume, "Operation Sunflower") was the name given to the dispatch of German and Italian troops to North Africa in February 1941, during the Second World War. The Italian 10th Army (10ª Armata) had been destroyed by the British, Commonwealth, Empire and Allied Western Desert Force attacks during Operation Compass (9 December 1940 – 9 February 1941). The first units of the new Deutsches Afrikakorps (DAK), commanded by Generalleutnant Erwin Rommel, departed Naples for Africa and arrived on 11 February 1941. (In the English-speaking world, the term Afrika Korps became a generic term for German forces in North Africa.) On 14 February, advanced units of the 5th Light Afrika Division (later renamed the 21st Panzer Division), Aufklärungsbataillon 3 (Reconnaissance Battalion 3) and Panzerjägerabteilung 39 (Anti-tank Detachment 39) arrived at the Libyan port of Tripoli and were sent immediately to the front line east of Sirte.
Rommel arrived in Libya on 12 February, with orders to defend Tripoli and Tripolitania, albeit using aggressive tactics. General Italo Gariboldi replaced Maresciallo d'Italia (Marshal of Italy) Rodolfo Graziani as the Governor-General of Libya on 25 March and Generale d'Armata Mario Roatta, Commander in Chief of the Royal Italian Army (Regio Esercito), ordered Graziani to place Italian motorised units in Libya under the new Italian–German command. The first German troops reached Sirte on 15 February, advanced to Nofilia on 18 February and a German raiding party ambushed a British patrol near El Agheila on 24 February. On 24 March, the Axis captured El Agheila and on 31 March attacked Mersa Brega. The understrength 3rd Armoured Brigade failed to counter-attack and began to retreat towards Benghazi the next day.