On July 31, 1793 Jefferson submitted his resignation from Washington's cabinet. Washington signed the Naval Act of 1794 and commissioned the first six federal frigates to combat Barbary pirates.
On July 31, French General Charles Chanson was assassinated during a propaganda suicide attack at Sa Đéc in South Vietnam that was blamed on the Việt Minh although it was argued in some quarters that Cao Đài nationalist Trình Minh Thế could have been involved in its planning.
On 31 July 2006, Fidel Castro's personal secretary, Carlos Valenciaga, announced on state-run television that Fidel Castro would provisionally hand over the duties of First Secretary of the Communist Party of Cuba (party chief), President of the Council of State of Cuba (head of state), President of the Council of Ministers of Cuba (prime minister), and Commander-in-Chief of the Armed Forces to Raúl Castro while Fidel underwent and recovered from intestinal surgery to repair gastrointestinal bleeding.
Ballack's debut for Chelsea came on 31 July 2006, during a practice match at UCLA's intramural football pitch. Chelsea presented him to the media the following day where the club also gave him his favoured number 13 shirt, worn throughout his career.
During the second debate in Detroit on July 31, Yang answered questions on topics including civil rights, healthcare, immigration, party strategy, climate, and the economy. He spoke for a total of 8.7 minutes, which was again the least of any candidate on either night. He was the only second-night candidate who did not spend any time in "back-and-forths" with other candidates. Yang drew attention for his decision to not wear a necktie in either debate. In his closing statement, Yang called out the media and the debate formats a September interview with Politico, Yang further clarified his stance on candidates attacking each other at the debates. According to Yang, there "is this sense of manufactured outrage and rehearsed attack lines", and as "a proxy for the American public", he finds "the process to be very false and somewhat misdirected" "It's not left, it's not right, it's forward" has been compared to a similar slogan used by the Green Party of Canada. On August 8, Yang received 2% support in the fourth qualifying poll, thus meeting both qualification criteria for the third debate