1st Army (Kingdom of Yugoslavia)

1st Army
Country	Yugoslavia
Branch	Royal Yugoslav Army
Type	Infantry
Size	Corps[a]
Part of	2nd Army Group
Engagements	Invasion of Yugoslavia (1941)
Commanders
Notable commanders	Milan Rađenković

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.

The 1st Army was not directly attacked during the first few days after the invasion commenced, but attacks on its flanks resulted in successive orders to withdraw to the lines of the Danube and then the Sava. The Hungarians then crossed the border in the sector for which the 1st Army had been responsible, but the Yugoslavs were already withdrawing and the Hungarians faced almost no resistance. This was followed by the German capture of Belgrade and the rear area units of 1st Army. Remnants of the 1st Army continued to resist along the line of the Sava, within days, tens of thousands of Yugoslav soldiers had been captured. The Germans closed on Sarajevo, and accepted the unconditional surrender of the Royal Yugoslav Army on 17 April, which came into effect at the following day.

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