Assertion: napoleon's command | /r/HasProperty | 18–19 june
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Source sentences:
text: As the 4th, 1st, and 2nd Prussian Corps marched through the town towards Waterloo the 3rd Prussian Corps took up blocking positions across the river, and although Grouchy engaged and defeated the Prussian rearguard under the command of Lt-Gen von Thielmann in the Battle of Wavre (18–19 June)