Fraud and the newly effective first-past-the-post voting system were the culprits; although the BANU was still relatively popular amongst the countrymen. In 1922 after gaining the approval by a plebiscite, the government began trying and imprisoning leaders of opposition parties for their roles in previous wars. In the face of repression, several parties decided that the overthrow of the government was a necessity to their survival.
Fraud and the newly effective first-past-the-post voting system were responsible; even though the BANU remained popular among citizens. In 1922, following a plebiscite, the government initiated trials and imprisonment of opposition party leaders for past conflicts. Under pressure, various groups concluded that toppling the government was essential to their survival.