Question: After being the Polish military attaché in Paris, Aleksander Kawałkowski became the consul general of a city on what river?
Context: Lille (] ; Dutch: "Rijsel" ] ; West Flemish: "Rysel" ) is a city in northern France, in French Flanders.  On the Deûle River, near France's border with Belgium, it is the capital of the Hauts-de-France region and the prefecture of the Nord department. Amaro Soares Bittencourt (1885-1963) was a diplomat, a military and civil engineer and a general officer of the Brazilian Army, who attained the Brazilian Army rank of General of Division or in its original Portuguese "General de Divisão" (the equivalent U.S. Army rank is Major General).  During the Second World War, then Brazilian “General de Brigada” (Brigadier General) Bittencourt was the chief of the Brazilian military mission to the United States, that is the military attaché at the Brazilian Embassy in Washington, D.C. Bittencourt was also a member of the Brazilian delegation to the Inter-American Defense Board.  In October 1942, he became the first recipient of the United States Legion of Merit (Commander).  France awarded Bittencourt the Legion of Honor (Officer) for his wartime service, and Brazil awarded him the Order of Military Merit (Brazil) or in its original Portuguese the “Ordem do Mérito Militar”.  The Major General was a graduate of Brazil’s Escola Militar and its Escola de Estado-Maior. Aleksander Kawałkowski (1899–1965) was a Polish soldier and diplomat.  He joined the Polish armed forces (Polska Organizacja Wojskowa) in 1915, and then the recreated Polish Army in 1918.  During the time of the Second Polish Republic, he was a lecturer in the Oficerska Szkoła Inżynieryjna (Officer's School of Engineering) military academy, a member of the Wojskowe Biuro Historyczne (Military History Bureau), and a member of the Ministry of Religion and Education.  From 1934 to 1936 he was a Polish military attaché in Paris and then became Polish consul general in Lille, France.  After the fall of France during the Nazi invasion, he was active in the Polish underground in France during World War II.  After the liberation of Paris in 1944, he joined the Polish government in exile at the rank of minister. The Polska Organizacja Walki o Niepodległość (Polish Organization for the Struggle for Independence, French: "L'Organisation polonaise de lutte pour l'indépendance "), also known as the POWN, was a Polish resistance army during World War II, It was founded in the south of France by Aleksander Kawałkowski in 1941, and conducted intelligence activities and propaganda.  It operated at first primarily in France, where it was the major component of the Polish resistance in France during World War II, where it was also known by the code name "Monika" or "Monica" It was called : Monique-bas in the free zone) and Monique-haut in the occupied zone. A military attaché is a military expert who is attached to a diplomatic mission (an attaché).  This post is normally filled by a high-ranking military officer who retains the commission while serving in an embassy.  Opportunities sometimes arise for service in the field with military forces of another state. Halina Szymańska (1906–1989) was a Polish spy, working for the British government, known as the Allies conduit to Nazi German Admiral Wilhelm Canaris.  Wife of Colonel Antoni Szymański, the last prewar Polish military attaché in Berlin, and later general Kazimierz Wiśniowski. Gheorghe Bagulescu (1886–1963) was a Romanian Brigadier-General during World War II, writer and art collector.  He served as Ambassador and Military Attaché to Tokyo from 1934 to 1939.  From 1941 to 1943, he was Ambassador to Tokyo & Nanking-China and Military Attaché to Tokyo. Bonner Frank Fellers (February 7, 1896 – October 7, 1973) was a U.S. Army officer who served during World War II as military attaché and psychological warfare director.  He is notable as the military attaché in Egypt whose extensive transmissions of detailed British tactical information were intercepted by Axis agents and passed to German field marshal Erwin Rommel for over six months, contributing to disastrous British defeats at Gazala and Tobruk in June 1942.  He was considered a protégé of General Douglas MacArthur. Group captain Franklin Augustas Sampson (1906 – 1992) O.C., O.B.E. was a Canadian war hero and accomplished military attaché.  Commonly known as F. A. "Sammy" Sampson he was born in 1906 in Royal Flat, Jamaica.  Stationed in England in 1939, he was instrumental in quashing a general strike by 1,500 Canadian enlisted personnel.  During World War II he was involved in the training of British and Commonwealth fighter pilots.  He was one of only three Canadian nationals assigned to Supreme Headquarters Allied Expeditionary Force under General Dwight D. Eisenhower.  He was an expert on prisoners of war and lobbied successfully for the military to be involved in civilian repatriation.  After the war he became a military attaché in Argentina (1948) and Paris (1951).  During his career he was awarded the Legion of Merit (United States), Croix de Guerre with Silver Star (France) and the Order of the British Empire.  He died in 1992 in Brockville, Canada. William Churchill, FRAI, AIA, AAG (October 5, 1859 – June 9, 1920) was an American Polynesian ethnologist and philologist, born in Brooklyn, New York, and educated at Yale, where he wrote for campus humor magazine "The Yale Record".  In 1896 he became consul general to Samoa.  In 1897 his commission was extended, making him also Consul General to Tonga.  In 1902 he began working for "New York Sun", where he later became a member of the editorial staff.  In 1915, he took a position as research associate in primitive philology at the Carnegie Institution in Washington, D.C.
Answer: Deûle River