Complex sentence: However the plans were predicated upon the performance of the French military in holding back the Nazi advance and the swift fall of France in May 1940 meant that Operation Pike and plans to launch bomber attacks against Soviet targets were put on hold and eventually abandoned.
Split into simpler sentences: However the plans were predicated upon the performance of the French military in holding back the Nazi advance. The swift fall of France in May 1940 meant that Operation Pike and plans to launch bomber attacks against Soviet targets were put on hold and eventually abandoned.