Wow...this day has been a pretty bad one all around!
September 1, 1939 - At dawn, Germany invaded Poland and bombed Warsaw at 6am, beginning World War II in Europe. Within one day of the invasion, Hitler was setting up SS "Death's Head" regiments to terrorize the citizens, giving a horrific glimpse at what was to come later in the war to those that opposed him or he didn't like.
And because this one is about where I live....
September 1, 1864 - General Sherman laid siege to Atlanta, Georgia, shelling civilians and cutting off supply lines. The Confederates troops retreated, destroying the city's munitions as they went. Later that year on November 15, Sherman's troops burned the city to the ground before continuing their march through the South.