G-Shock is very popular with Skateboarders, Snowboarders, BMX riders, Moto-X, Paramedics, Astronauts, Firemen and Soldiers. According to Mark Bowden's book Blackhawk Down, the DELTA Operators wore G-Shock watches during the combat events of October 3 and October 4. Since then, G-Shocks watches have become very popular with Special Forces groups in both American and other NATO nation units, due to their being "battle tested".