1. a person who rises in violent opposition to lawful authority, esp. a person who engages in armed resistance to a government or to the execution of its laws; rebel.
2. a member of a section of a political party that revolts against the methods or policies of the party

Link to present incidents:
The U.S. military is investigating two incidents involving its forces in Afghanistan that may have unintentionally led to the deaths of several civilians.

Afghan officials, quoted by wires services, said a Sunday night airstrike in the town of Nijrab, north of Kabul, killed a family of nine, including several young children.

A coalition spokesman told CNN the airstrike, carried out by U.S. forces, targeted insurgents who fired rockets on a U.S. military base in Nijrab, located in Kapisa province.