Kosta Kumanudi was a Serbia

Serbia

Serbia , officially the Republic of Serbia , is a landlocked country located at the crossroads of Central and Southeast Europe, covering the southern part of the Carpathian basin and the central part of the Balkans...

n politician with the Democratic Party

Democratic Party (Yugoslavia)

The Yugoslav Democratic Party, State Party of Serbian, Croatian and Slovene Democrats and Democratic Party was the name of a series of social-liberal political parties that existed in succession in the State of Slovenes, Croats and Serbs, the Kingdom of Serbs, Croats and Slovenes, and the Kingdom...

, and later with the Yugoslav Radical Peasant Democracy, forerunner to the Yugoslav National Party

Yugoslav Radical Union

The Yugoslav Radical Union was a conservative political party in the Kingdom of Yugoslavia.The party was formed by the Serbian politician Milan Stojadinović in 1935. It was made up by different groups, that could be divided in three parts: in Serbia, it was made mostly by former members of the...

.

From 1921 to 1922 Kumanudi was Finance Minister of the Kingdom of Serbs, Croats and Slovenes and Minister of Internal Affairs for a short time in 1922. He was Mayor of Belgrade

Mayor of Belgrade

The Mayor of Belgrade is the head of the City of Belgrade . He acts on behalf of the City, and performs an executive function in the City of Belgrade. The position of the Belgrade mayor is important as the city is the most important hub of economics, culture and science in Serbia...

 from 1926 to 1929.

In 1941 Kumanudi signed the Appeal to the Serbian Nation to collaborate with Serbia's quisling government

Quisling

Quisling is a term used in reference to fascist and collaborationist political parties and military and paramilitary forces in occupied Allied countries which collaborated with Axis occupiers in World War II, as well as for their members and other collaborators.- Etymology :The term was coined by...

. He was later tried as part of the Belgrade Process and was sentenced to time in jail for his role in establishing the quisling government with General Milan Nedić

Milan Nedic

Milan Nedić was a Serbian general and politician, he was the chief of the general staff of the Yugoslav Army, minister of war in the Royal Yugoslav Government and the prime minister of a Nazi-backed Serbian puppet government during World War II.After the war, Yugoslav communist authorities...

at its helm.