Ill health.
486 BC, when Egypt revolted against Persian rule
Darius I died in -486.
he was killed by his own men . According to Afghan Historian, the late M. G. M. Ghubar, Darius III was killed by a Bactrian [present Afghanistan], called Basus, around 333BC, who declared himself the King of Bactria.
Darius III died in -330.
Darius Clark died in 1871.
Darius Crouter died in 1910.
Darius A. Brown died in 1911.
Darius Kinsey died in 1945.
Darius Cobb died in 1919.
Darius Crosby died in 1818.
Xerxes I of Persia died in -465.
Dometius of Persia died in 363.