Reconnaissance by fire
Reconnaissance by fire (recon by fire), also known as speculative fire, is a warfare tactic used in which military forces may fire on likely enemy positions to provoke a reaction, which confirms the presence and the position of enemy forces. == World War II == Reconnaissance by fire was widely adopted by the Allies against the Axis in the European theater of World War II. Previously armored units would typically advance in column behind light armored scouting units.