HORMES was the spirit (daimon) of impulse or effort (to do a thing), eagerness, setting onself in motion, and starting an action. In the context of war, hormê was a violent forward movement--an assault or attack. It seems more likely, however, that the Hormes worshipped at Athens was simply the virtue of industrious effort. His opposite number was the Daimona Aergia (Sloth).
HORME (Hormê), the personification of energetic activity, who had an altar dedicated to her at Athens. (Paus. i. 17. § 1.)
Source: Dictionary of Greek and Roman Biography and Mythology.
Pausanias, Description of Greece 1. 17. 1 (trans. Jones) (Greek travelogue C2nd A.D.) :
"They [the Athenians] are conspicuous . . . for their devotion to religion. They have an altar of Aidos (Shame), one to Pheme (Rumour) and one to Hormes (Effort)."
- Pausanias, Description of Greece - Greek Travelogue C2nd A.D.