Detailed Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : The Battle of the Fischa or Battle of the Leitha took place on 11 September 1146 near the Fischa River at the border of the Kingdom of Hungary and the March of Austria, which belonged to the overlordship of the Dukes of Bavaria and it was ruled by margraves of the Franconian Babenberg dynasty.
Answer : 11 September 1146
A:
What was the date of Battle of the Fischa?