Lieutenant-General Peter Grigorievich Chaus (Belarusian: Пётр Рыгоравіч Чавус; born on 7 January 1939 in Staryna, Gomel) was the first Defence Minister of Belarus, serving from December 1991 to April 1992. He was succeeded by Pavel Pavlovich Kozlovsky.
He graduated from Minsk Suvorov Military School and later Tashkent Higher Military Command School. He began his service as commander of a tank platoon in the North Caucasus Military District. He then served as the deputy commander of a tank battalion in the Belarussian military district. In 1968, he participated in Warsaw Pact invasion of Czechoslovakia. He graduated from the Military Political Academy named after Lenin. In 1978, he attended the Military Academy of the General Staff of the Armed Forces. He served in the Central Asian Military District in 1980. In 1987, he became an adviser to the Chief of the General Staff of the Democratic Republic of Afghanistan. From 1988 to 1991 he was the chief of staff of the Baltic Military District. In 1991, he served as head of the Institute of Military History of the USSR, the chief of staff, and first deputy head of the Civil Defense of the USSR.
At the end of 1991 during a business trip in Minsk he accepted the offer to lead the newly created Ministry of Defense of Belarus. From May 1992 he served as the Deputy Minister of Defense. From 1994 to 1995 he was an adviser to the Belarusian government.