What happened April 1919 AD

On 4 April, South African General Jan Smuts was sent to Hungary. He carried the proposition that the Hungarian communist government under Kun abide by the conditions previously presented to Károlyi in the Vix note. Smuts' mission also represented official recognition of the Kun communist government by the Allied council.

A policy of ostracism of RIC men was announced by the Dáil on 11 April 1919.

In rural Georgia, the riot of Jenkins County led to 6 deaths, as well as the destruction of various property by arson, including the Carswell Grove Baptist Church, and 3 black Masonic lodges in Millen, Georgia.

When Kun became aware of Romanian preparations for an offensive, he fortified mountain passes in the territory controlled by the Hungarian Army. Then, on the night of 15–16 April, the Hungarians launched a preemptive attack.

When Kun declined the terms of the Vix note, Romania acted to enforce the new railway demarcation line. Romania planned to take an offensive action on 16 April 1919. The north battalion was to take Nagykároly and Nagyvárad. This would separate the elite Hungarian Székely division from the rest of the Hungarian army. The north battalion would then outflank the Hungarian Army. Simultaneously, the south battalion would advance to Máriaradna and Belényes.

By 18 April, the first elements of the Romanian offensive were completed and the Hungarian front was broken.

On 19 April, Romanian forces took Nagykároly.

On 20 April they took Nagyvárad (Oradea) and Nagyszalonta (Salonta). Rather than following the instructions of the Vix note, the Romanian army pressed on for the Tisza River, an easily defended natural military obstacle.

On 23 April, Debrecen was occupied by Romanian forces.

The Romanian Army began preparations for an assault on Békéscsaba. On 25–26 April, after some heavy fighting, Békéscsaba fell to Romanian forces.

The Hungarians retreated to Szolnok and from there across the Tisza River. They established two concentric defense lines extending from the Tisza River around Szolnok. Between 29 April and 1 May, the Romanian Army broke through these lines.

On 30 April, French Foreign Minister Stéphen Pichon summoned Ion I.C. Brătianu, the Romanian representative to the Paris Peace Conference. Romania was told to cease its advance at the Tisza River and retreat to the first demarcation line imposed by the Allied council. Brătianu promised that Romanian troops would not cross the Tisza River.