Complex sentence: An Oasis in Hitler's Desert In March 1939, when Hitler took what remained of Czechoslovakia by force, Hungary was allowed to annex Carpathian Ruthenia, as well after a conflict with the First Slovak Republic during the Slovak-Hungarian War Hungary gained further territories.
Split into simpler sentences: An Oasis in Hitler's Desert In March 1939, when Hitler took what remained of Czechoslovakia by force, Hungary was allowed to annex Carpathian Ruthenia. After a conflict with the First Slovak Republic during the Slovak-Hungarian War of 1939, Hungary gained further territories.