The United States Catholic Mission Association is a community of faith leaders engaged in networking, formation, and advocacy. for God’s mission. The United States Catholic Mission Association (USCMA) is a community of faith leaders engaged in networking, formation, and advocacy for God’s mission. USCMA works to create a culture of mission at every level of the Church by supporting Church leaders entrusted with animating the call to proclaim, serve, and witness to the Reign of God’s love.