The conversation between human and AI assistant.
[|Human|] What was the result and impact of the First Battle of Tannenberg?
[|AI|] The Teutonic Order was defeated in the First Battle of Tannenberg and the subsequent decline of the Teutonic Order led to PolishâLithuanian union becoming the dominant regional force.
[|Human|] 
What was the result and impact of the First Battle of Tannenberg?