FORAY

[noun] [C] - the act of an army suddenly and quickly entering the area belonging to the enemy in order to attack them or steal their supplies, or (by people in general) a brief involvement in an activity which is different from and outside the range of a usual set of activitiesThe soldiers made the first of several forays into enemy-occupied territory.She made a brief foray into acting before starting a career as a teacher.(informal) A foray to a particular place is a short visit, esp. with a known purpose.I made a quick foray into town before lunch to get my sister a present.