During WWII there was a big question about whether to continue Major League Baseball or to put it on hold. On one hand, resources were incredibly scarce. On the other hand, it provided a sense of comfort and a chance to get aware from the unbearably serious nature of what was going on. President Roosevelt famously sent the "Green Light Letter" to baseball commissioner Landis, telling them to continue playing.
Most of my WWII baseball collection is related to games by players who were drafted and playing for Military Bases, in Europe or in the Pacific Theatre (mostly Hawaii). This original newspaper drawing by cartoonist Bill Crawford (wiki link below) expresses public support for continued play.
https://en.wikipedia.org/wiki/Bill_Crawford_(cartoonist)