WW1 at the Battle of the Sommes.
The Civil War had the most AMERICAN deaths
the most casualties in a war was the American Civil War with 495,332 deaths and behind it is WW2 with 405,399 deaths.
The atomic bombs dropped on Nagasaki or Hiroshima.
russia had the most deaths in ww1
Friday
Disease.
The Soviet Union (U.S.S.R.). By far. And the most civilian deaths by far.
Disease and neglect
I think its Superbowl Sunday.
WW II.
The USSR.
Besides the obvious injuries and deaths, most deaths were the result of infection, dysentery, diarrhoea, secondary infections, pneumonia, and TB.