Nixon pursued a foreign policy of détente to reduce Cold War tensions. He established closer relations with China and the Soviet Union, negotiating arms limitations with the latter. Nixon also worked to resolve crises in the Middle East through shuttle diplomacy following the 1973 Yom Kippur War and Arab oil embargo against the U.S. and other countries supporting Israel. Domestically, Nixon advocated new federalism and a Southern strategy while also pursuing some liberal policies like creating the EPA and advancing affirmative action.