UNIA grew rapidly and in just over 18 months it had branches in 25 U.S. states, as well as divisions in the West Indies, Central America, and West Africa. The exact membership is not known, although Garvey—who often exaggerated numbers—claimed that by June 1919 it had two million members. It remained smaller than the better established National Association for the Advancement of Colored People (NAACP), although there was some crossover in membership of the two groups. The NAACP and UNIA differed in their approach; while the NAACP was a multi-racial organization which promoted racial integration, UNIA had a black-only membership policy. The NAACP focused its attention on what it termed the "talented tenth" of the African-American population, such as doctors, lawyers, and teachers, whereas UNIA included many poorer people and Afro-Caribbean migrants in its ranks, seeking to project an image of itself as a mass organization. To promote his views to a wide audience, Garvey took to shouting slogans from a megaphone as he was driven through Harlem in a Cadillac.