Timeline Worksheet: August 23, 1990, Germany Geography On August 23, 1990, East and West Germany announced their upcoming reunification. Explore Germany with this geography worksheet and learn about the geography of East and West Germany. Timeline Worksheet: August 23, 1990, Germany Geography Worksheet * Blank printable timeline index card Printable timeline index card (Fits European history timeline.) If you are new to this series, visit my introduction to timeline index cards. Return to the Timeline-AD.