He didn't.
Germany invaded Poland, which obliged Great Britain and France, by their respective treaties with Poland, to declare war on Germany, which was the beginning of the greater war.
they invaded Poland
Poland was under foreign military occupation.
names of the current foreign ministers of the world
Vyacheslav Molotov
They started the war in Europe by invading Poland.
Antisemitism did not contribute to outbreak of World War 2. Hitler invaded Poland in order to seize land, not in order to hunt for Jews.
Stefan Kleczkowski has written: 'Poland and Britain' -- subject(s): Foreign relations, World War, 1939-1945, History 'Poland's first 100,000' -- subject(s): Poland, Poland. Armia, World War, 1939-1945
Lech Walesa
Mao Ze Dong or YOSUKE MATSUOKA
Anita Prazmowska has written: 'Britain, Poland, and the eastern front, 1939' -- subject(s): Foreign relations, World War, 1939-1945, Diplomatic history, Causes 'Britain and Poland, 1939-1943' -- subject(s): Foreign relations, Diplomatic history, Poland, Great Britain, World War, 1939-1945 'Civil war in Poland 1942-1948' -- subject(s): History 'Ignacy Paderewski' -- subject(s): Politics and government, Statesmen, Biography, Foreign relations, History
In most countries, the head of state, such as the President or Prime Minister, is typically responsible for overseeing foreign relations. They may appoint a Minister of Foreign Affairs or Secretary of State to specifically handle diplomatic affairs and represent the country on the world stage.
Count Leopold Berchtold was the Imperial Foreign Minister for Austria-Hungary during World War I.