Like many of the previous Call of Duty games you will be given plenty of chances to flank the enemy to get some easy kills. Flanking also gives you more opportunities to mark enemy equipment, field upgrades, and killstreaks with the Spotter perk. If you do decide to flank an opponent you may want to consider taking the Ghost perk to conceal your whereabouts and equip your gun with a suppressor to help you sneak about undetected.