| Date | Event |
|---|---|
| May 26 1871 | Aimé Maillart Died |
| May 04 1871 | National Association Baseball League Opens Season |
| May 21 1871 | Bloody Week - French Troops Invade Paris Commune |
| May 21 1871 | Rigi-Bahnen, First European Rack Railway |
| May 22 1871 | U.S. Army Abandonment Ordered For Fort Kearny |
| May 28 1871 | Fall Of The Paris Commune |