[3][4] In January 1960 he assisted an association of Baptist Congolese in their unsuccessful attempt to gain official recognition from the Belgian colonial authorities.
[1] His CEREA faction secured an additional number of seats in the assembly, and he subsequently organised a coalition with independents and smaller parties.
[7] Upon assuming office, Miruho encouraged the local population to welcome and co-operate with the Europeans residing in the region "on the condition that they do not get involved in politics".
[9] In an attempt to resolve the situation, the Congolese government under Prime Minister Patrice Lumumba announced that the Force Publique officer corps was to be Africanised.
[11] The large departure of Europeans deprived Kivu's administration of essential personnel, and Miruho attempted to fill vacant leadership positions according to the seniority and competence of those considered for promotions.
[16] In January 1961 Lumumba was killed, and ethnic tensions dramatically rose throughout Kivu in February, paralysing Adrien Omari's government and facilitating Miruho's return to power[4] when Cyrille Adoula became Prime Minister in August.
In response, Adoula's government placed Miruho and his family under house arrest[20] and subsequently accused him of planning to ally Kivu with Katanga's secession.