Kautilya's Arthashastra 10.4.2

10.4.2

dhānvanavananimnasthalayodhināṃ khanakākāśadivārātriyodhināṃ ca puruṣāṇāṃ nādeyapārvatānūpasārasānāṃ ca hastinām aśvānāṃ ca yathāsvam iṣṭā yuddhabhūmayaḥ kālāś ca //

For men who are trained to fight in desert tracts, forests, valleys, or plains, and for those who are trained to fight from ditches or heights, during the day or night, and for elephants which are bred in countries with rivers, mountains, marshy lands, or lakes, as well as for horses, such battlefields as they would find suitable (are to be secured).