Refusing to obey an illegal order isn't an option in the US military; it's a requirement.

But it does take courage and bravery.

Here are some inspiring examples:

Hugh Thompson (My Lai): Thompson landed his helicopter between American soldiers and fleeing civilians, ordering his crew to shoot at fellow soldiers if they continued to kill civilians.

Michael Jackson (Kosovo): British General Mike Jackson refused a direct order from U.S. General Wesley Clark to block Russian troops at Pristina Airport, stating he would not start "the Third World War".

Soldiers at My Lai: Multiple soldiers under Lt. Calley's command disobeyed implicit or explicit orders to participate in the mass murder and rape of civilians by refusing to participate in the killings.

Legal Duty to Disobey: Service members are legally required to obey lawful orders, but MUST refuse illegal orders"those violating the Constitution, U.S. law, or international law (such as the Geneva Conventions).

"Following Orders" Defense: "I was just following orders" is not a valid defense against war crimes.