Complex sentence: Britain and France told the Czech president Edvard Beneš that he must hand to Germany all territory with a German majority but Hitler increased his aggression against Czechoslovakia, ordering the establishment of a Sudeten German paramilitary organisation, which carried out terrorist attacks on Czech targets.
Split into simpler sentences: Britain and France told the Czech president Edvard Beneš that he must hand to Germany all territory with a German majority. But Hitler increased his aggression against Czechoslovakia, ordering the establishment of a Sudeten German paramilitary organisation, which carried out terrorist attacks on Czech targets.