[1] It consisted of the Christian Democratic Union (CDU), Democratic Awakening (DA) and the German Social Union (DSU).
The German Forum Party was invited to join, but declined.
[2] The Alliance won the most votes in the 1990 East German general election, winning 48.2% of votes cast (CDU 40.9%; DSU 6.3%; DA 0.9%), and would control 192 of 400 seats in the Volkskammer.
It formed the government in East Germany until German Reunification.
https://www.britannica.com/event/Austro-German-Alliance https://www.nationalarchives.gov.uk/education/greatwar/g2/backgroundcs1.htm Heather Grabbe and Wolfgang Münchau (6/2/02) "Germany and Britain: an alliance of necessity" The Centre for European Reform and the Friedrich Ebert Stiftung