The party, which started its life as an anti-colonial party with the slogan "Integration or self-determination" was now inclined towards the first part of the formula. A referendum was held in 1956 but given the number of abstentions and massive opposition by the Nationalist Party and the Catholic Church, the result was inconclusive. This, together with a number of dismissals at the naval dockyard led to Mintoff's resignation and his call for massive protests in April 1958.[citation needed]