After the collapse of the Austrian-Hungarian Empire in 1918, Maribor was claimed by both the State of Slovenes, Croats and Serbs and German Austria. On 1 November 1918, a meeting was held by Colonel Anton Holik in the Melje barracks, where it was decided that the city would be part of German Austria. Ethnic Slovene Major Rudolf Maister, who was present at the meeting, denounced the decision and organised Slovenian military units that were able to seize control of the city. All Austrian officers and soldiers were disarmed and demobilised to the new state of German Austria. The German city council then held a secret meeting, where it was decided to do whatever possible to regain Maribor for German Austria. They organised a military unit called the Green Guard ("Schutzwehr"), and approximately 400 well-armed soldiers of this unit opposed the pro-Slovenian and pro-Yugoslav Major Maister. Slovenian troops surprised and disarmed the Green Guard early on the morning of 23 November. Thereafter, the city remained in Slovenian hands.