Original sentence: During World War II, the Czechoslovak part was occupied by Hungary under the First Vienna Award.In 1918 (confirmed by the Treaty of Trianon 1920), the part of Komárom county north of the Danube became part of newly formed Czechoslovakia (Komárno county).The part of the county north of the river Danube is now in Slovakia, is part of the Nitra region and is largely identical with the Komárno district
Edited sentence: During World War II, the Czechoslovak part was annexed by Hungary under the First Vienna Award.In 1920 after the Treaty of Trianon, the part of Komárom county north of the Danube became part of newly formed Czechoslovakia (Komárno county)