Invasion of Yugoslavia

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"April War" redirects here. For other uses, see April War (disambiguation).

Invasion of Yugoslavia (Unternehmen 25)

Part of World War II

Map of the Axis attack

Date	April 1941
Location	Kingdom of Yugoslavia
Result	Axis victory

Combatants

Allied Powers:

Yugoslavia

Axis Powers:

Germany
Italy
Bulgaria
Hungary
Romania

Commanders

Milorad Petrović
Milan Nedić
Dušan Trifunović

Maximilian von Weichs
Wilhelm List
Vittorio Ambrosio

Strength

850,000

700,000

Casualties

Unknown

Germany: 151 killed
Italy: 3,324 killed or wounded

Balkans Campaign
Greco-Italian War – Yugoslavia – Greece – Crete – People's Liberation War

The Invasion of Yugoslavia (code-name Operation 25), or the so-called April War, was the Axis Powers' attack on Yugoslavia on April 6, 1941 during World War II. The invasion ended with unconditional surrender of the Royal Yugoslav Army on April 17, 1941, the occupation of the region by the Axis and the creation of the puppet regime in Croatia.

1 Background
2 Operations
3 Losses
4 See also
5 External links

[edit] Background

Fascist Italy had attacked Greece in October 1940 and had been forced back into Albania. Adolf Hitler recognised the need to go to his ally's aid, not only to restore diminished Axis prestige, but also to prevent Great Britain from being able to bomb the Romanian oilfields from which Germany obtained most of her oil.

Following agreements with Hungary, Romania and Bulgaria that they would join the Axis, Hitler put pressure on Yugoslavia to join the Tripartite Pact. The Regent, Prince Paul, succumbed to this pressure on March 25, 1941. However, this move was deeply unpopular amongst the anti-Axis Serbian public and military and a coup d'etat was launched on March 27, 1941.

This unexpected event caused Hitler to become enraged and he decided to postpone the attack on his Russian allies in order to punish Yugoslavia for its defiance. A statement from the new Yugoslavian rulers that they would after all adhere to the Axis did nothing to calm his anger.

On April 6, 1941, Axis armies invaded from all sides and the Luftwaffe bombed Belgrade. The Axis victory was swift, as Yugoslavia surrendered in only 11 days on April 17, 1941. The insistence of the Yugoslav Army on trying to defend all the borders did not help matters. Yugoslavia was subsequently divided amongst Germany, Hungary, Italy and Bulgaria, with most of Serbia being occupied by Germany. The Croatian fascist leader Ante Pavelic took the opportunity to declare an Independent State of Croatia.

[edit] Operations

[edit] The bombing of Belgrade

see: Bombing of Belgrade in World War II

The Luftwaffe opened the assault on Yugoslavia by conducting a saturation-type bombing raid on the capital in the early morning hours of 6 April. Flying in relays from airfields in Austria and Romania, 150 bombers and dive-bombers protected by a heavy fighter escort participated in the attack. The initial raid was carried out at fifteen-minute intervals in three distinct waves, each lasting for approximately twenty minutes. Thus, the city was subjected to a rain of bombs for almost one and a half hours. The German bombardiers directed their main effort against the center of the city, where the principal government buildings were located.

The weak Yugoslav Air Force and the inadequate flak defenses were quickly wiped out by the first wave, permitting the dive-bombers to come down to roof-top levels. Against the loss of but two German fighters, twenty Yugoslav planes were shot down and forty-four were destroyed on the ground. When the attack was over, more than 17,000 inhabitants lay dead under the debris. This devastating blow virtually destroyed all means of communication between the Yugoslav high command and the forces in the field. Although some elements of the general staff managed to escape to one of the suburbs, coordination and control of the military operations in the field were rendered impossible from the outset.

Having thus delivered the knockout blow to the enemy nerve center, the VIII Air Corps was able to devote its maximum effort to such targets of opportunity as Yugoslav airfields, routes of communication, and troop concentrations, and to the close support of German ground operations.

"Eleventh day" – Advancing German armored units - Niš, Serbia, April 17. 1941

[edit] The Three-Pronged Drive on the Yugoslav Capital

Three separate ground forces converged on Belgrade from different directions. They were launched as follows:

1. First Panzer Croup (Twelfth Albany):

Early in the morning of April 8, the First Panzer Group jumped off from its assembly area northwest of Sofiya. Crossing the frontier near Pirot, the XIV Panzer Corps, spearheaded by the 11th Panzer Division, followed by the 5th Panzer, 294th Infantry, and 4th Mountain Divisions, advanced in a northwesterly direction toward Niš. Despite unfavorable weather, numerous road blocks, and tough resistance by the Yugoslav Fifth Army, the 11th Panzer Division, effectively supported by strong artillery and Luftwaffe forces, quickly gained ground and broke through the enemy lines on the first day of the attack. The Yugoslav army commander was so greatly impressed by this initial German success that he ordered his forces to withdraw behind the Morava. This maneuver could not be executed in time because, as early as April 9, the German lead tanks rumbled into Niš and immediately continued their drive toward Belgrade. From Niš northwestward the terrain became more favorable since the armored columns could follow the Morava valley all the way to the Yugoslav capital.

South of Paraćin and southwest of Kragujevac Yugoslav Fifth Army units attempted to stem the tide of the advance but were quickly routed after some heavy fighting. More than 5,000 prisoners were taken in this one encounter.

Meanwhile, the 5th Panzer Division became temporarily stalled along the poor roads near Pirot. After the division got rolling again, it was ordered to turn southward just below Niš and cut off the enemy forces around Leskovac. When it became apparent that the Niš front was about to collapse, the 5th Panzer Division reverted to the direct control of Twelfth Army and joined the XL Panzer Corps for the Greek campaign.

On 10 April the XIV Panzer Corps forces were swiftly advancing through the Morava Valley in close pursuit of enemy units retreating toward their capital. On the next day the German spearheads suddenly drove into the southern wing of the withdrawing Yugoslav Sixth Army, which they overran during the early hours of 12 April. By the evening of that day the First Panzer Group tanks stood less than forty miles southeast of Belgrade. The two Yugoslav armies they had encountered were in such a state of confusion that they were no longer able to make any serious attempt to delay the German thrust or cut the German lines of communications that extended over a distance of roughly 125 miles from the point of entry into Yugoslav territory.

2. XLI Panzer Corps (Independent Force):

Timed to coincide with the armored thrust of the XIV Panzer Corps from the southeast, the XLI Panzer Corps drive led across the southeastern part of the Banat and toward the Yugoslav capital. This attack was spearheaded by the Motorized Infantry Regiment "Gross Deutschland," closely followed by the 2d SS Motorized Infantry Division. After crossing the frontier north of Vršac, advance elements entered Pančevo on 11 April. Having meanwhile advanced to within about forty-five miles north of Belgrade, the main body of XLI Panzer Corps met with only isolated resistance on the following day as it raced toward the enemy capital.

3. XLVI Panzer Corps (Second Army):

When the Luftwaffe launched its attacks on 6 April, the German Second Army was just beginning to assemble its attack forces along the northern Yugoslav frontier preparatory to its projected jumped on 10 April. In an effort to improve their lines of departure, some of the Second Army units took advantage of the interim period by launching limited-objective attacks all along the frontier zone. The troop commanders had to keep their forces in check to prevent major engagements from developing prematurely, which might subsequently have impaired the army's freedom of action and jeopardized the conduct of operations.

The Army High Command was determined to seize intact the principal bridges in the XLVI Panzer Corps zone. Therefore, as early as 1 April, corps elements were ordered to capture the bridge at Bares and the railroad bridge about ten miles northeast of Koprivoica by a coup de Ann.

By early evening of 6 April, the lack of enemy resistance and the overall situation seemed to indicate that the Yugoslavs would not make.

a concerted stand along the border and the XLVI Panzer Corps was therefore ordered to establish bridgeheads across the Mura and Drava at Mursko Sredisce, Letenye, Zakany, and Barcs. The few local attacks carried out by the corps sufficed to create dissension in the enemy ranks. There was a high percentage of Croats in the Yugoslav Fourth Army units that were responsible for the defense of this area. Croat soldiers mutinied at several points of the Drava salient, refusing to resist the Germans whom they considered as their liberators from Serbian oppression. When strong German forces crossed the Drava bridge at Bares on the morning of 10 April and broke out of the previously established bridgeheads, the disintegration of the opposing Yugoslav forces had reached an advanced stage. Supported by strong air forces, the 8th Panzer Division, followed by the 16th Motorized infantry Division, launched the XLVI Panzer Corps thrust to Belgrade by driving southeastward between the Drava and Sava Rivers. By the evening of 10 April forward elements of the 8th Panzer Division, having met with virtually no resistance, reached Slating despite poor roads and unfavorable weather. Enemy pockets were quickly mopped up and the division drove on in the direction of the capital via Osijek, where the roads became even worse.

That the plight of the enemy was becoming more and more desperate could be gathered from the following appeal that General Dušan Simović broadcast to his troops:

"All troops must engage the enemy wherever encountered and with every means at their disposal. Don't wait for direct orders from above but act on your own and be guided by your judgment, initiative, and conscience."

On 11 April the 8th Panzer Division reached the Osijek region, while the 16th Motorized Infantry Division farther back was advancing beyond Našice. Numerous bridge demolitions and- poor roads retarded the progress of both divisions, whose mission it was to attack the rear of the Yugoslav forces that faced XIV Panzer Corps, and to establish early contact with the First Panzer Group.

At 0230 on 12 April, the 8th Panzer Division entered Mitrovica after two vital bridges across the Sava had been captured intact. The division continued its thrust with the main body advancing toward Lazarevac, about twenty miles south of Belgrade, which was the designated link-up point with First Panzer Group.

On the afternoon of 12 April, the XLVI Panzer Corps received new orders. According to these, only elements of the 8th Panzer Division were to continue their eastward drive to seize and secure the Sava bridge near the western outskirts of Belgrade. At 1830 the main body of the division turned southeastward and moved in the direction of Valjevo to establish contact with the left wing of First Panzer Group southwest of Belgrade. Simultaneously, the 16th Motorized Infantry Division, which had been trailing behind the 8th Panzer Division, turned southward, crossed the Sava, and advanced toward Zvornik. Thus both divisions were diverted from their original objective, Belgrade, in order to participate in the subsequent drive on Sarajevo.

Meanwhile, both the Second Army and the Army High Command were anxiously awaiting news of the fall of Belgrade. Of the three converging armored forces, XLI Panzer Corps was last reported closest to the capital, having reached Pancevo on the east bank of the Danube about ten miles east of the city. South of Belgrade resistance stiffened as the 11th Panzer Division, spearheading the First Panzer Group forces, neared the capital.

[edit] The fall of Belgrade

Since three separate attack forces were converging on Belgrade simultaneously, the Army High Command was not immediately able to determine which force was the first to reach the enemy capital. Toward early evening of 12 April, SS-Obersturmfuehrer (1st Lt.) Klingenberg of the 2d SS Motorized Infantry Division, finding all Danube bridges destroyed, took an SS patrol across the river in captured pneumatic rafts. The patrol entered the city unmolested, and at 1700 hoisted the Nazi flag atop the German legation. About two hours later the mayor of Belgrade officially handed over the city to Klingenberg who was accompanied by a representative of the German Foreign Ministry, previously interned by the Yugoslavs.

At Second Army headquarters, no word from the 8th Panzer Division elements, which were last reported approaching the western outskirts of Belgrade, had been received for twenty-four hours. Finally, at 1152 on 13 April the following radio message came through from the operations officer of the division:

During the night the 8th Panzer Division drove into Belgrade, occupied the center of the city, and hoisted the Swastika nag.

However, since better communications had existed between Second Army and First Panzer Group, the following flash was received shortly before the 8th Panzer Division message came in:

Panzer Group von Kleist has taken Belgrade from the south. Patrols of Motorized Infantry Regiment "Gross Deutschland" have entered the city from the north. With General von Kleist at the head, the 11th Panzer Division has been rolling into the capital since 0632.

Thus the race for Belgrade ended in a close finish with all three forces reaching their objective almost simultaneously. With the fall of the city, the First Panzer Group was transferred from the Twelfth to the Second Army, while the XLVI Panzer Corps was placed under the direct command of the panzer group for the next phase of the operation-the pursuit and final destruction of the remnants of the Yugoslav Army.

[edit] Losses

A destroyed Yugoslav Renault FT-17 or NC-27 tank

The losses sustained by the German attack forces were unexpectedly light. During the twelve days of combat the total casualty figures came to 558 men: 151 were listed as killed, 392 as wounded, and 15 as missing in action. During the XLI Panzer Corps drive on Belgrade, for example, the only officer killed in action fell victim to a civilian sniper's bullet.

The Germans took some 254,000 prisoners, excluding a considerable number of ethnic Croat, German, Hungarian, and Bulgarian Yugoslavians who had been conscripted into the Yugoslav Army and who were quickly released after screening.