Complex sentence: Captain Ewald von Kleist volunteered to replace von dem Bussche, and attempt a similar suicide bombing at a viewing scheduled for 11 February 1944; yet this event was repeatedly postponed and eventually cancelled.
Split into simpler sentences: Captain Ewald von Kleist volunteered to replace von dem Bussche, and attempt a similar suicide bombing at a viewing scheduled for 11 February 1944. But this event was repeatedly postponed and eventually cancelled.