Original: Terrorists tried to force the release of Baader and ten other imprisoned RAF members by kidnapping Hanns Martin Schleyer on 5 September 1977, as part of the sequence of events known as the "German Autumn", which began on 30 July 1977 with the murder of the banker Jürgen Ponto.
Simplified: Hanns Martin Schleyer was kidnapped on 5 September 1977 and Lufthansa Flight 181 was hijacked in mid-October to try to force the release of Baader and ten other RAF members.