The Yugoslav People's Army, also called the Yugoslav National Army, was the military of the Socialist Federal Republic of Yugoslavia and its antecedents from 1945 to 1992.
The German invasion of Greece, also known as the Battle of Greece or Operation Marita, was the attacks on Greece by Italy and Germany during World War II. The Italian invasion in October 1940, which is usually known as the Greco-Italian War, was followed by the German invasion in April 1941. German landings on the island of Crete came after Allied forces had been defeated in mainland Greece. These battles were part of the greater Balkans Campaign of the Axis powers and their associates.
The 1st Army was a Royal Yugoslav Army formation commanded by Armijski đeneral Milan Rađenković during the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941 during World War II. It consisted of one infantry division, one horsed cavalry division, and two brigade-strength infantry detachments. It formed part of the 2nd Army Group, and was responsible for the defence of the section of the Yugoslav-Hungarian border between the Danube and the Tisza rivers.
Operation Retribution, also known as Operation Punishment, was the April 1941 German bombing of Belgrade, the capital of Yugoslavia, in retaliation for the coup d'état that overthrew the government that had signed the Tripartite Pact. The bombing occurred in the first days of the German-led Axis invasion of Yugoslavia during World War II. The Royal Yugoslav Army Air Force (VVKJ) had only 77 modern fighter aircraft available to defend Belgrade against the hundreds of German fighters and bombers that struck in the first wave early on 6 April. Three days prior, VVKJ Major Vladimir Kren had defected to the Germans, disclosing the locations of multiple military assets and divulging the VVKJ's codes.
The invasion of Yugoslavia, also known as the April War or Operation 25, was a German-led attack on the Kingdom of Yugoslavia by the Axis powers which began on 6 April 1941 during World War II. The order for the invasion was put forward in "Führer Directive No. 25", which Adolf Hitler issued on 27 March 1941, following a Yugoslav coup d'état that overthrew the pro-Axis government.
The Yugoslav Army, commonly the Royal Yugoslav Army, was the land warfare military service branch of the Kingdom of Yugoslavia. It existed from the Kingdom's formation in December 1918, until its surrender to the Axis powers on 17 April 1941. Aside from fighting along the Austrian border in 1919–20 related to territorial disputes, and some border skirmishes on its southern borders in the 1920s, the JV was not involved in fighting until April 1941 when it was quickly overcome by the German-led invasion of Yugoslavia.
The Royal Navy, commonly the Royal Yugoslav Navy, was the naval warfare service branch of the Kingdom of Yugoslavia. It was brought into existence in 1921, and initially consisted of a few former Austro-Hungarian Navy vessels surrendered at the conclusion of World War I and transferred to the new nation state under the terms of the Treaty of Saint-Germain-en-Laye. The only modern sea-going warships transferred to the new state were twelve steam-powered torpedo boats, although it did receive four capable river monitors for use on the Danube and other large rivers. Significant new acquisitions began in 1926 with a former German light cruiser, followed by the commissioning of two motor torpedo boats (MTBs) and a small submarine flotilla over the next few years. When the name of the state was changed to Yugoslavia in 1929, the name of its navy was changed to reflect this. In the late 1920s, several of the original vessels were discarded.
The Yugoslav order of battle before the invasion of Yugoslavia includes a listing of all operational formations of the Royal Yugoslav Army, Royal Yugoslav Army Air Force and Royal Yugoslav Navy immediately prior to the World War II invasion of that country in April 1941.
The Axis order of battle for the invasion of Yugoslavia was made up of the various operational formations of the German Wehrmacht and Waffen-SS, Italian Armed Forces and Hungarian Armed Forces that participated in the invasion of Yugoslavia during World War II, commencing on 6 April 1941. It involved the German 2nd Army, with elements of the 12th Army and a panzer group combined with overwhelming Luftwaffe support. The eighteen German divisions included five panzer divisions, two motorised infantry divisions and two mountain divisions. The German force also included two well-equipped independent motorised regiments and was supported by over 800 aircraft. The Italian 2nd Army and 9th Army committed a total of 22 divisions, and the Royal Italian Air Force had over 650 aircraft available to support the invasion. The Hungarian 3rd Army also participated, with support from the Royal Hungarian Air Force.
The 2nd Army Group was a Royal Yugoslav Army formation commanded by Armijski đeneral Milutin Nedić during the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941 during World War II. It consisted of the 1st and 2nd Armies, comprising four infantry divisions, one horsed cavalry division, two brigade-strength infantry detachments, and one horsed cavalry regiment. It was responsible for the defence of the border with Hungary from Slatina to the Tisza river.
The 2nd Army was a Royal Yugoslav Army formation commanded by Armijski đeneral Dragoslav Miljković that opposed the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941 during World War II. It consisted of three infantry divisions and one horsed cavalry regiment along with supporting units. It formed part of the 2nd Army Group, and was responsible for the defence of the Yugoslav–Hungarian border along the Drava river from Slatina to the Danube.
The 3rd Army was a Royal Yugoslav Army formation commanded by Armijski đeneral Ilija Brašić during the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941 during World War II. It consisted of two reinforced infantry divisions, two infantry divisions, and a brigade-strength horsed cavalry detachment. It formed part of the 3rd Army Group, and was responsible for the Yugoslav-Albania border between Lake Ohrid and Lake Skadar.
The 7th Army was a Royal Yugoslav Army formation raised prior to the German-led Axis invasion of Yugoslavia in April 1941, during World War II. It consisted of two divisions, two brigade-strength mountain detachments, and a brigade-strength infantry detachment. It formed part of the 1st Army Group, and was responsible for the defence of Yugoslavia's north-western frontier with Italy and Germany. Like all Yugoslav formations at the time, the 7th Army had serious deficiencies in both mobility and firepower.
Milorad Petrović was an Armijski đeneral in the Royal Yugoslav Army who commanded the 1st Army Group during the April 1941 German-led Axis invasion of Yugoslavia of World War II. Petrović was commissioned into the Royal Serbian Army in 1901 and served in multiple staff positions during the Balkan Wars. During World War I, he served in various staff roles at the army and divisional level during the Serbian Campaign and later on the Macedonian front. Following the war, he took part in military operations along the disputed northern border of the nascent Kingdom of Serbs, Croats and Slovenes, which was renamed the Kingdom of Yugoslavia in 1929. During the interwar period, Petrović was steadily promoted, performing key roles at the Ministry of the Army and Navy. He reached the rank of armijski đeneral in 1937. At the time of the 27 March 1941 Yugoslav coup d'état, he was the military commander of the Yugoslav capital, Belgrade.
The 538th Frontier Guard Division, also known as the Division z.b.V. 538. was a short-lived German division in World War II that participated in the invasion of Yugoslavia. It was disbanded immediately after the Yugoslav surrender.
The 40th Infantry Division Slavonska was an infantry formation of the Royal Yugoslav Army that formed part of the 4th Army during the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941. It was partly mobilised from the Osijecka military district, and, like all Yugoslav infantry divisions of the time, was a very large and unwieldy formation which was almost entirely reliant on animal transport for mobility. Commanded by Brigadni đeneral Ratko Raketić, it was largely manned by Croat troops, many of whom saw the Germans as potential liberators from Serbian oppression during the interwar period, and the division also lacked modern arms and sufficient ammunition.
The 27th Infantry Division Savska was an infantry formation of the Royal Yugoslav Army that formed part of the 4th Army during the German-led invasion of Yugoslavia by the Axis powers in April 1941. It was raised from the Savska divisional district, and like all Yugoslav infantry divisions of the time, was a very large and unwieldy formation almost entirely reliant on animal transport for mobility. Commanded by Divizijski đeneral August Marić, the division was largely made up of ethnic Croat troops, many of whom saw the Germans as potential liberators from Serbian oppression during the interwar period. It also lacked modern arms and sufficient ammunition.
The 32nd Infantry Division Triglavski was a short-lived Royal Yugoslav Army infantry formation raised prior to the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941. It was largely mobilised from the Dravska military district, and, like all Yugoslav infantry divisions of the time, was a very large and unwieldy formation which was almost entirely reliant on animal transport for mobility. Commanded by Divizijski đeneral Dragiša Pandurović and largely manned by Slovene troops, the division also lacked modern arms and sufficient ammunition.
The 1st Cavalry Division of the Royal Yugoslav Army was established in 1921, soon after the creation of the Kingdom of Serbs, Croats and Slovenes, which became the Kingdom of Yugoslavia in 1929. In peacetime it consisted of two cavalry brigade headquarters commanding a total of four regiments. It was part of the Yugoslav 1st Army Group during the German-led World War II Axis invasion of Yugoslavia in April 1941, with a wartime organisation specifying one cavalry brigade headquarters commanding two or three regiments, and divisional-level combat and support units.
The 38th Infantry Division Dravska was a short-lived Royal Yugoslav Army infantry formation raised prior to the German-led Axis invasion of the Kingdom of Yugoslavia in April 1941. It was largely mobilised from the Dravska divisional district, and, like all Yugoslav infantry divisions of the time, was a very large and unwieldy formation which was almost entirely reliant on animal transport for mobility. Commanded by Divizijski đeneral Čedomir Stanojlović and largely manned by Slovene and ethnic German troops, the division also lacked modern arms and sufficient ammunition to meet the German onslaught.
Yugoslavia 
