Gil Grissom:  Humans have always adapted strategies from insects . Swarming is an ancient military tactic . You surround your enemies , then attack from all directions simultaneously . Alexander the Great pioneered the maneuver 2000 years ago . Although swarms consist of several individuals , they must be treated as a single entity , which lives , thinks and moves as _ one _ , built with an internal logic to continue forward , gain momentum and never backtrack .