It was one of the famous inter-war clubs in Romania.
Founded by merging of two different teams, "Tricolor" and "Unirea".
President and owner of the team was Nicolae LUCESCU, and a famous public character around Unirea Tricolor was Titi Barosanu, a leader of fans.
Tricolor, first named Teiul, was set up in 1914, in the district of Obor, by some high-school students. Among first players, Costel Rădulescu, in 1930's coach and manager of national Romanian team and co-founder of the moden national championship system (by leagues). After WWI, it is champion of Bucharest Region and plays in the final tournament of National Championship. In September 23 1923 the team wins the first game of a Romanian club against a former-Yugoslavian (Beogradski Belgrad: 2-1).
The other club, Unirea, was founded in 1924, by merging of Orizontul and "Zburătorii", in the same district of Obor.
In 1947-1948, due to Communist regime norms (stating that all sport associations had to join a form of trade-union, or a governmental institution), the team is taken over by Ministry of Internal Affairs and, in May 14 1948, merged with another club, Ciocanul (former Maccabi), the new teams being named Dinamo "A" and Dinamo "B".
In season 1947-1948, they played as Dinamo "A" (Ciocanul) and Dinamo "B" (Unirea Tricolor), and next season, in Divizia A remained only one, Dinamo "A" (later Dinamo București), Dinamo "B" (Unirea Tricolor) being relegated in Divizia B.
In season 1950 Dinamo "B" (Unirea Tricolor) moved to Brașov as Dinamo Brașov, in 1957-1958 it moved to Cluj-Napoca and in 1958-1959 it definitely transferred to Bacău.