Updated list of solvers:
During the 1st World War (1914-1918) a grave was discovered. It belonged to a French soldier who died the last day of a month in another war, in Italy. His halberd lay next to his body. The day carved in the grave’s stone tablet multiplied by the length of the halberd (in feet), multiplied by the half of years between his death and the discovery of his grave, and finally, multiplied by the half of the age of the French commander of the campaign where the soldier died, make 451,066.
Who was the French commander?
Thanks to Bibao for providing this one; can you figure it out? Will keep a list of solvers above.