For 10 points, identify this number historically referred to as a myriad.
The leaders of a group of this many men offered to make Ariaeus king, but Ariaeus declined since he wasn't of royal blood. The elite Zhayedan units consisted of this many soldiers. In his Secret History, Procopius reports that "this many times this many times this many" was the number of people that Justinian killed. Upon reaching Mount Theches near Trebizond, a group of this many men is reported as having cried (*) "The sea! The sea!" in joy. The officers of that group of this many men were betrayed and killed at a feast held by Tissaphernes. This number provided an alternative name for the Persian Immortals, and is also the name of the mercenary company that fought at Cunaxa whose story is told in the Anabasis of Xeonphon. For 10 points, identify this number historically referred to as a myriad.
The leaders of a group of this many men offered to make Ariaeus king, but Ariaeus declined since he wasn't of royal blood.
ten thousand [or a myriad before mentioned]