Not being able to gain the support of the party-centre, in early 1948 Carandini and a group of leading left-wing liberals left the PLI, assembling first in the Rinascita Liberale movement and, later that year, founding the Movimento Liberale Indipendente (MLI), which aimed on creating a Third Force alliance of all center-left democratic parties and groups as a lay counter-part of dominating Christian Democrats.
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As the leading right-wing during the Fourth Republic, it won around 14% of the vote in 1951 and 1956 and participated in Third Force government coalitions, taking a major role in governments at the beginning of the 1950s.
This was the case in Canada were Ukrainian Canadians activists such as Jaroslav Rudnyckyj and Paul Yuzyk and other "third force" successfully pressured the Canadian government to adopt multiculturalism as official policy in 1971.
The third force, the 3rd Division under Brigadier General José Fernandes, left from Jaguarão, protecting Caxias' left.