During the civil rights movement (1954–1968), American Jews and African Americans formed strategic alliances to challenge racial inequality and injustice across the country. This built on earlier solidarity between the two communities, which had resulted in, among other things, Jewish activists taking many of the leadership positions within the early NAACP. Jewish individuals and organizations provided financial support, legal expertise, and grassroots activism to support the growing movement nationwide. Prominent Jewish organizations involved in this "Grand Alliance" included the Anti-Defamation League and the American Jewish Congress. Prominent Jewish leaders such as Rabbi Abraham Joshua Heschel and Jack Greenberg marched alongside figures like Martin Luther King Jr. and contributed significantly to landmark legal victories.