The War years also saw the founding of the All-American Girls Professional Baseball League, established in part to compensate for the loss of many of the best major league players to the war effort. He deemed the game a necessary morale booster during the difficult times. At the same time, though, President Franklin Delano Roosevelt issued what is now known as the " Green Light Letter" to encourage play to continue. In World War II, more than 500 major leaguers β and 37 Hall of Famers β served in the armed forces, with many of them sacrificing prime years of their careers. Cobb recovered, but Mathewson was exposed to a much larger dose of poison, which damaged his lungs and contributed to his death from tuberculosis eight years later at the age of 45. During one of these training exercises an accident occurred, causing Cobb and Mathewson to be exposed to the gas. Flaticon, the largest database of free icons. One of these drills sent soldiers into an airtight chamber into which actual poison gas was released. Vector icons in SVG, PSD, PNG, EPS and ICON FONT Download over 7,753 icons of round in SVG, PSD, PNG, EPS format or as webfonts. Among them were several future Hall of Famers, including Christy Mathewson, Branch Rickey, George Sisler and Ty Cobb, who all served in the Chemical Warfare Service, commonly referred to as βThe Gas and Flame Division.β These baseball icons were instructors, training U.S. In arcade mode, the game draws two teams of players (up to 32 people) with planes of different. During World War I, 227 major leaguers served in various branches of the military. 1.6 April Fools (1st April) Events 1.7 World War Mode.