reconnaissance

An inspection or exploration of an area, especially one made to gather military information.

The act or operation of reconnoitering; preliminary examination or survey.

An examination or survey of a region in reference to its general geological character.

An examination of a region as to its general natural features, preparatory to a more particular survey for the purposes of triangulation, or of determining the location of a public work.

An examination of a territory, or of an enemy’s position, for the purpose of obtaining information necessary for directing military operations; a preparatory expedition.

a demonstration or attack by a large force of troops for the purpose of discovering the position and strength of an enemy.

The act of scouting or exploring (especially military or medical) to gain information.

the act of reconnoitring (especially to gain information about an enemy or potential enemy)