Although diasporas often leave their homelands due to violence or political upheaval, these groups may engage in homeland politics by providing financial, material, or diplomatic assistance to militants engaged in civil conflicts. Conversely, diasporas may ignore homeland civil conflicts and exclusively focus on opportunities available in their host states. This study argues that variation in diasporas’ degree of integration into their host states influences whether diasporas support militants opposing homeland governments. Diaspora members may be dissimilated, which undermines their ability to consolidate resources in support of homeland militants, or incorporated, which limits their will to engage in homeland civil conflicts. Moderately integrated diasporas, which maintain identity ties with the homeland and have access to beneficial resources, are most likely to aid militants fighting homeland civil conflicts. Using original data, I test and find support for this integration-based theory.