Aerial bombing of cities in the context of "Baedeker Blitz"

On 26 April 1937, the Basque town of Guernica (Gernika in Basque) was aerially bombed during the Spanish Civil War. It was carried out at the behest of Francisco Franco's rebel Nationalist faction by its allies, the Nazi German Luftwaffe's Condor Legion and the Fascist Italian Aviazione Legionaria, under the code name Operation Rügen. The town was being used as a communications centre by Republican forces just behind the front line, and the raid was intended to destroy bridges and roads. The operation opened the way to Franco's capture of Bilbao and his victory in northern Spain.

The attack gained controversy because it involved the bombing of civilians by a military air force. Seen as a war crime by some historians and argued as a legitimate attack by others, it was one of the first aerial bombings to capture global attention. Under the international laws regarding aerial warfare in 1937, Guernica was a legitimate military target. The number of victims is still disputed; the Basque government reported 1,654 people killed at the time, while local historians identified 126 victims (later revised by the authors of the study to 153). A British source used by the USAF Air War College claims 400 civilians died. Soviet archives claim 800 deaths on 1 May 1937, but this number may not include victims who later died of their injuries in hospitals or whose bodies were discovered buried in the rubble.

The Siege of Sevastopol, also known as the Defence of Sevastopol (Russian: Оборона Севастополя, romanized: Oborona Sevastopolya) or the Battle for Sevastopol (German: Schlacht um Sewastopol;Romanian: Bătălia de la Sevastopol; Russian: Битва за Севастополь, romanized: Bitva za Sevastopol'), was a military engagement that took place on the Eastern Front of the Second World War. The campaign was fought by the Axis powers of Germany and Romania against the Soviet Union for control of Sevastopol, a port in Crimea on the Black Sea. On 22 June 1941, the Axis invaded the Soviet Union during Operation Barbarossa, with Axis land forces reaching the Crimean peninsula in the autumn of 1941 and overrunning most of the area. The only objective not in Axis hands was Sevastopol. Several attempts were made to secure the city in October and November 1941. A major attack was planned for late November, but heavy rains delayed it until 17 December 1941. Under the command of Erich von Manstein, Axis forces were unable to capture Sevastopol during this first operation. Soviet forces launched an amphibious landing on the Crimean peninsula at Kerch in December 1941 to relieve the siege and force the Axis to divert forces to defend their gains. The operation saved Sevastopol for the time being, but the bridgehead in eastern Crimea was eliminated in May 1942.

After the failure of their first assault on Sevastopol, the Axis opted to conduct siege warfare until the middle of 1942, at which point they attacked the encircled Soviet forces by land, sea, and air. On 2 June 1942, the Axis began this operation, codenamed Störfang (Sturgeon Catch). The Soviet Red Army and Black Sea Fleet held out for weeks under intense Axis bombardment. The German Air Force (Luftwaffe) played a vital part in the siege, its 8th Air Corps bombing the besieged Soviet forces with impunity, flying 23,751 sorties and dropping 20,528 tons of bombs in June alone. The intensity of the German airstrikes was far beyond previous German bombing offensives against cities such as Warsaw, Rotterdam or London. At the end of the siege, there were only 11 undamaged buildings left in Sevastopol. The Luftwaffe sank or deterred most Soviet attempts to evacuate their troops by sea. The German 11th Army suppressed and destroyed the defenders by firing 46,750 tons of artillery ammunition on them during Störfang.

V-weapons, known in original German as Vergeltungswaffen (German pronunciation: [fɐˈgɛltʊŋsˌvafṇ], German: "retaliatory weapons", "reprisal weapons"), were a particular set of long-range artillery weapons designed for strategic bombing during World War II, particularly strategic bombing and aerial bombing of cities. They were the V-1, a pulsejet-powered cruise missile; the V-2, a liquid-fueled ballistic missile; and the V-3 cannon. Germany intended to use all of these weapons in a military campaign against Britain, though only the V-1 and V-2 were so used in a campaign conducted 1944–45. After the invasion of western Europe by the Allies, these weapons were also employed against targets on the mainland of Europe, mainly in France and Belgium. Strategic bombing with V-weapons killed approximately 18,000 people, mostly civilians. The cities of London, Antwerp and Liège were the main targets.

V-weapons formed part of the range of the so-called Wunderwaffen (superweapons, or "wonderweapons") of Nazi Germany.

During World War II, the Estonian capital Tallinn suffered from many instances of aerial bombing by the Soviet air force and the German Luftwaffe. The first bombings by Luftwaffe occurred during the Summer War of 1941 as part of Operation Barbarossa. A number of Soviet bombing missions to then German-occupied Tallinn followed in 1942–1944.

The most extensive of Soviet aerial bombing campaign in Tallinn occurred on 9–10 March 1944 and is known as the 1944 March bombing (Estonian: 1944 märtsipommitamine). After Soviet saboteurs had disabled the water supply, over a thousand incendiary bombs were dropped on the city, causing widespread fires and killing 757 people, of whom 586 were civilians and 75 prisoners of war, wounding 659, and leaving over 20,000 people without shelter.

The bombing of Warsaw in World War II started with the aerial bombing campaign of Warsaw by the German Luftwaffe during the siege of Warsaw in the invasion of Poland in 1939. It also included German bombing raids during the Warsaw Uprising in 1944. During the course of the war, approximately 85% of the city was destroyed due to German mass bombings, heavy artillery fire, and a planned demolition campaign.

In 1940, Rotterdam was subjected to heavy aerial bombardment by the Luftwaffe during the German invasion of the Netherlands during the Second World War. The objective was to support the German troops fighting in the city, break Dutch resistance and force the Dutch army to surrender. Bombing began at the outset of hostilities on 10 May and culminated with the destruction of the entire historic city centre on 14 May, an event sometimes referred to as the Rotterdam Blitz. According to an official list published in 2022, at least 1,150 people were killed, with 711 deaths in the 14 May bombing alone, and 85,000 more were left homeless.

The psychological and the physical success of the raid, from the German perspective, led the Oberkommando der Luftwaffe (OKL) to threaten to destroy the city of Utrecht if the Dutch command did not surrender. The Dutch surrendered in the late afternoon of 14 May and signed the capitulation early the next morning.

Strategic bombing during World War I (28 July 1914 – 11 November 1918) was principally carried out by the United Kingdom and France for the Entente Powers and Germany for the Central Powers. Most of the belligerents of World War I eventually engaged in some form of strategic bombing. The aerial bombing of cities, intended to destroy the enemy's morale, was introduced by the Germans in the opening days of the war. A multi-national air force to strike at Germany was planned but never materialized.

Early strategic bombing attempts led to the development of specialized bomber aircraft, during World War I. Initially bombs were dropped by hand and aimed by the naked eye, but by the end of the war bombsights had been developed. The introduction of air raid warnings and shelters can be dated to World War I, as can the design of anti-aircraft artillery and the development of methods for coordinated aerial defence. Many of the advocates of strategic bombing during the interwar period, such as Italy's Giulio Douhet, America's Billy Mitchell, and Britain's Hugh Trenchard, had commanded aircraft during World War I. The improvements in aircraft technology during and after the war convinced many that "the bomber will always get through", and this belief influenced planning for strategic bombing during World War II.