First Wilfred DeFour fought discrimination. Then he fought the Nazis. He helped America win both battles. DeFour, who was one of the last of the famed Tuskegee Airmen — all-black units that included pilots, technicians, mechanics and other support personnel who signed up for the Army Air Force to fight in WWII — died Saturday. He was 100. A home care attendant found in the bathroom of his 5th Avenue apartment in Harlem at around 9 a.m., police said. His death leaves about 100 of the approximately 16,000 Airmen still alive. DeFour, who after the war worked 33 years for the US Postal Service, performed his last official act last month, appearing at the Colonial Park branch in Harlem for a ceremony renaming the building after the Tuskegee Airmen. He unveiled a plaque with Congressman Adriano Espaillat, who spearheaded the renaming process. Also present was former Congressman Charlie Rangel. WPIX quoted DeFour telling the crowd, “I appreciate all of the appreciation. It’s a wonderful day for me.” DeFour, who served as chief official in the Airmen’s engineering office, modestly told the crowd, he did not know his service would help make history. He died of natural causes, police said.