Wikipedia:Today's featured article/April 15, 2022

The 4th Army was a Royal Yugoslav Army formation mobilised prior to the German-led invasion of the Kingdom of Yugoslavia during World War II. It initially consisted of three infantry divisions, one brigade-strength detachment, one horse cavalry regiment and one independent infantry regiment. It was responsible for defending a large section of the Yugoslav–Hungarian border, being deployed behind the Drava river between Varaždin and Slatina. Like all Yugoslav formations at the time, the 4th Army had serious deficiencies in both mobility and firepower, and it was only partially mobilised when the invasion began on 6 April 1941. The 4th Army put up scattered resistance, but began to withdraw southwards on 9 April, and on 10 April it ceased to exist as an operational formation. The remains of the 4th Army were ordered to stop fighting on 15 April, and the Yugoslav Supreme Command surrendered unconditionally, effective on 18 April.