Agni Purāṇa

228 - Instructions relating to military expedition 

Pushkara said:

1. When a king is attacked by a strong enemy and he thinks “I have been attacked”, heshould undertake the military expedition. 

2. If the (king thinks that the) warriors had been wellcared for and the servants well supported and he feels, “I have a strong army and I am capable of protecting the central (army)”, heshould go with them and move into the camp. 

3-5. Otherwise one may invade (the country of) the enemy when it (the latter's country) is afflicted by natural calamities such as the appcarance of the earthquake in that direction or the comet afflicting it or the army of the enemy king dislikes that king and awaits his ruin. Oneshould enter the kingdom of the enemy when he has auspicious throbbing (of the muscles) of the body, has good dreams and good omens. Oneshould employ an army consisting largely of infantry etc. and elephants in the rainy season. 

6. In the early and advanced winter itshould consist of chariots and cavalry, while itshould consist of four divisions of an army (cavalry, infantry etc.) in the spring and autumn. 

7. An army consisting of a large number of infantry would always win the enemies. The throbbing (of the muscles) on the right side of the body) would be commendable. 

8. So also the palpitation on the left back and the heart and mark of mole (on the left side)should be known as not commen dable. While the contrary to what has been told on the left side would be auspicious for women.