Chjeno-Piast was an unofficial (yet common) name of a coalition

Coalition

A coalition is a pact or treaty among individuals or groups, during which they cooperate in joint action, each in their own self-interest, joining forces together for a common cause. This alliance may be temporary or a matter of convenience. A coalition thus differs from a more formal covenant...

 of Polish

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 political parties formed in 1923. It included the Polish Peasant Party "Piast" and an older coalition 1922 Christian Association of National Unity (Chrześcijański Związek Jedności Narodowej). The merger was passed during a meeting in the manor of senator L. Hammerling's from Lanckorona

Lanckorona

Lanckorona is a village in Poland, near Kraków. It is famous for its well preserved 19th century wooden houses....

 and at times it is referred to as Pact of Lanckorona.

The Chjeno-Piast coalition was the political base of two consecutive governments formed by Wincenty Witos

Wincenty Witos

Wincenty Witos was a prominent member of the Polish People's Party from 1895, and leader of its "Piast" faction from 1913. He was a member of parliament in the Galician Sejm from 1908–1914, and an envoy to Reichsrat in Vienna from 1911 to 1918...

. The first, formed in May 1923, antagonized Józef Piłsudski, who resigned his government posts blaming Chjeno-Piast for assassination of Gabriel Narutowicz

Gabriel Narutowicz

Gabriel Narutowicz was a Lithuanian-born professor of hydroelectric engineering at Switzerland's Zurich Polytechnic, and Poland's Minister of Public Works , Minister of Foreign Affairs , and the first president of the Second Polish Republic....

. This government was forced to resign in December of that year in the effect of massive worker riots

1923 Kraków riot

1923 Kraków riot refers to a riot that took place during a strike on 6 November 1923 in Kraków, Poland. The riot is also called 1923 Kraków uprising, particularly by the Marxist sources.-Background:...

 in Kraków

Kraków

Kraków also Krakow, or Cracow , is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life...

. The second, formed in May 1926, had even less support and was soon overthrown by the May Coup organized by Józef Piłsudski.

The name of the coalition was quite unfortunate in that its first limb (being an abbreviation of Chrześcijańska Jedność Narodowa) resembles the Polish word hiena, meaning hyena

Hyena

Hyenas or Hyaenas are the animals of the family Hyaenidae of suborder feliforms of the Carnivora. It is the fourth smallest biological family in the Carnivora , and one of the smallest in the mammalia...

.