Pedzisa mutsara unotevera: Yakatangwa muna 1926, UNP yakanyoresa kukunda kwayo kwekutanga musarudzo muna 1928, mubatanidzwa weNational Peasants' Party. Chikwata chayo chakakwikwidza musarudzo dzose dzemakore mapfumbamwe akatevera, kazhinji vachipesana nevamwe vekuUkraine kana maRusyns, uye kazhinji kazhinji mubatanidzwa nemapato makuru. Munenge muna 1933, kurwisana kwaro nechiKomonisiti kwakariita kuti rionekwe nyore nyore nevamiriri veNazi. Kuoneka kwaro kwokupedzisira kwakanga kuri mukati mokukwikwidza kwa1937, apo rakakunda chigaro chayo chokupedzisira muParamende mukubatana neNational Liberal Party. Kufanana nemamwe mapato ose eRomania, UNP yakarambidzwa, mukuvamba kwa1938, neNational Renaissance Front. Zalozetsky-Sas nevamwe vaimbova vatungamiriri veUNP vakashanda sevamiriri veUkraine mukati meFront pamberi pe
Kutorwa neSoviet muna 1940.