The Mongols also used deception very well in their wars. For instance, when approaching a mobile army the units would be split into three or more army groups, each trying to outflank and surprise their opponents. This created many battlefield scenarios for the opponents where the Mongols would seem to appear out of nowhere and there were seemingly more of them than in actuality. Flanking and/or feigned retreat if the enemy could not be handled easily was one of the most practiced techniques. Other techniques used commonly by the Mongols were completely psychological and were used to entice/lure enemies into vulnerable positions by showing themselves from a hill or some other predetermined locations, then disappearing into the woods or behind hills while the Mongols' flank troops already strategically positioned would appear as if out of nowhere from the left, right and/or from their rear. During the initial states of battlefield contact, while camping in close proximity of their enemies at night, they would feign numerical superiority by ordering each soldier to light at least five fires, which would appear to the enemy scouts and spies that their force was almost five times larger than it actually was.