Question: The Winter Line was a series of German and Italian military fortifications in Italy, constructed during World War II by Organisation Todt and commanded by Albert Kesselring,  was a German "Luftwaffe Generalfeldmarschall" during which event?
Context: Kurt Mälzer (2 August 1894 in Altenburg – 24 March 1952 in Werl) was a German general of the Luftwaffe and a war criminal during World War II.  In 1943, Mälzer was appointed the military commander of the city of Rome, subordinated to General Eberhard von Mackensen under the overall command of Field Marshal Albert Kesselring.  Under his authority, Mälzer commanded not only the garrison Wehrmacht troops in Rome itself, but also indirectly the SS security forces in the city (although these troops were nominally under the authority of the SS and Police Leader of the region, Wilhelm Harster). The Gothic Line (German: "Gotenstellung" ; Italian: "Linea Gotica" ) was a German defensive line of the Italian Campaign of World War II.  It formed Field Marshal Albert Kesselring's last major line of defence along the summits of the northern part of the Apennine Mountains during the fighting retreat of the German forces in Italy against the Allied Armies in Italy, commanded by General Sir Harold Alexander. The Todt Organisation (German: Organisation Todt , OT) was a civil and military engineering group in the Third Reich from 1933 to 1945, named after its founder, Fritz Todt, an engineer and senior Nazi figure.  The organization was responsible for a huge range of engineering projects both in pre-World War II Germany, in Germany itself and occupied territories from France to the Soviet Union during the war.  It became notorious for using forced labour.  From 1943-45 during the late phase of the Third Reich OT administered all constructions of concentration camps to supply forced labor to industry. Franz Xaver Dorsch (24 December 1899 – 8 November 1986) was a German civil engineer who became the chief engineer of the Organisation Todt (OT), a civil and military engineering group in Nazi Germany that was responsible for a huge range of engineering projects at home and in the territories occupied by the Germans during the Second World War.  He played a leading role in many of the Third Reich's biggest engineering projects, including the construction of the Siegfried Line (Westwall), the Atlantic Wall and numerous other fortifications in Germany and occupied Europe.  Following the war, he founded the Dorsch Consult consulting engineering company in Wiesbaden. The Trasimene Line (so-named for Lake Trasimene, the site of a major battle of the Second Punic War in 217 BCE) was a German defensive line during the Italian Campaign of World War II.  It was sometimes known as the Albert Line.  The German Commander-in-Chief (C-in-C), "Generalfeldmarschall" Albert Kesselring, used the line to delay the Allied northward advance in Italy in mid June 1944 to buy time to withdraw troops to the Gothic Line and finalise the preparation of its defenses. Fritz Todt (4 September 1891 – 8 February 1942) was a German construction engineer, senior Nazi figure, who rose from "Inspector General for German Roadways" where he oversaw the construction of German Autobahnen ("Reichsautobahnen") to Reich Minister for Armaments and Ammunition where he led the entire war military economy.  At the beginning of World War II he founded what Hitler named "Organisation Todt" a military engineering company which supplied industry with forced labor and administered all constructions of concentration camps in the late phase of the Third Reich.  He died in a plane crash in 1942. During the Italian Campaign of World War II, the Barbara Line was a series of German military fortifications in Italy, some 10 - south of the Gustav Line, from Colli al Volturno to the Adriatic Coast in San Salvo and a similar distance north of the Volturno Line.  Near the eastern coast, it ran along the line of the Trigno river.  The line mostly consisted of fortified hilltop positions. Wolf's Lair (German: "Wolfsschanze"; Polish: "Wilczy Szaniec") was Adolf Hitler's first Eastern Front military headquarters in World War II.  The complex, which became one of several "Führerhauptquartiere" (Führer Headquarters) in various parts of eastern Europe, was built for the start of Operation "Barbarossa" – the invasion of the Soviet Union – in 1941.  It was constructed by Organisation Todt. The Winter Line was a series of German and Italian military fortifications in Italy, constructed during World War II by Organisation Todt and commanded by Albert Kesselring.  The series of 3 lines was designed to defend a western section of Italy, focused around the town of Monte Cassino, through which ran the important Highway 6 which led uninterrupted to Rome.  The primary Gustav Line ran across Italy from just north of where the Garigliano River flows into the Tyrrhenian Sea in the west, through the Apennine Mountains to the mouth of the Sangro River on the Adriatic coast in the east.  The two subsidiary lines, the Bernhardt Line and the Hitler Line ran much shorter distances from the Tyrrehnian sea to just North East of Cassino where they would merge into the Gustav Line.  Relative to the Gustav Line, the Hitler Line stood to the North-West and the Bernhardt Line to the South-East of the primary defenses. Albert Kesselring (30 November 1885 – 16 July 1960) was a German "Luftwaffe Generalfeldmarschall" during World War II.  In a military career that spanned both World Wars, Kesselring became one of Nazi Germany's most skilful commanders, and one of the most highly decorated, being one of 27 soldiers awarded the Knight's Cross of the Iron Cross with Oak Leaves, Swords and Diamonds.  Nicknamed "Smiling Albert" by the Allies and "Uncle Albert" by his troops, he was one of the most popular generals of World War II with the rank and file.
Answer: World War II