Complex sentence: British Prime Minister Neville Chamberlain met with Adolf Hitler in "Berchtesgaden" on 15 September and agreed to the cession of the Sudetenland; three days later, French Prime Minister Édouard Daladier did the same.
Split into simpler sentences: British Prime Minister Neville Chamberlain met with Adolf Hitler in "Berchtesgaden" on 15 September and agreed to the cession of the Sudetenland. Three days later, French Prime Minister Édouard Daladier did the same.