Surveillance sweep

Surveillance Sweep is an Allied Top Secret Protocol introduced during the Third World War. When used, a group of supersonic spy planes will sweep in and explore the designated area for enemy forces, including any disguised or stealth units.

Game effects
To use this ability: click on an area on the map (A) where you want to explore, then click on another spot (B) to mark the flight path of the spy planes. The planes will arrive and sweep the area from A in the direction of B.