No, says Kautilya, of strength, place, and time, each is helpful to the other; whoever is possessed of these three things should, after having placed one-third or one fourth of his army to protect his base of operations against his rear-enemy and wild tribes in his vicinity and after having taken with him as much army and treasure as is sufficient to accomplish his work, march during the month of Márgásírsha (December) against his enemy whose collection of food-stuffs is old and insipid and who has not only not gathered fresh food-stuffs, but also not repaired his fortifications, in order to destroy the enemy's rainy crops and autumnal handfuls (mushti). He should march during the month of Chaitra (March), if he means to destroy the enemy's autumnal crops and vernal handfuls. He should march during the month of Jyestha (May-June) against one whose storage of fodder, firewood and water has diminished and who has not repaired his fortifications, if he means to destroy the enemy's vernal crops and handfuls of the rainy season. Or he may march during the dewy season against a country which is of hot climate and in which fodder and water are obtained in little quantities. Or he may march during the summer against a country in which the sun is enshrouded by mist and which is full of deep valleys and thickets of trees and grass, or he may march during the rains against a country which is suitable for the manœuvre of his own army and which is of the reverse nature for his enemy's army. He has to undertake a long march between the months of Márgasírsha (December) and Taisha (January), a march of mean length between March and April, and a short march between May and June; and one, afflicted with troubles, should keep quiet.