The Nationalist Party of Greater Vietnam (in Vietnamese: Đại Việt Quốc dân đảng), often known simply as Đại Việt or ĐVQDĐ, was a nationalist and anti-communist political party and militant organisation that was active in Vietnam in the 20th century. The party operated rather secretively and had ties with Nguyễn Văn Thiệu. The party continues to be active outside of Vietnam, with the goal of a multi-party democratic government for the country.