@chris6137 – I cannot agree with you. Look at this definition:
“Common definitions of terrorism refer only to those violent acts which are intended to create fear and terror, are perpetrated for a religious, political or ideological goal, deliberately target or disregard the safety of non-combatants (civilians), and are committed by non-government agencies.” (Source: Wikipedia)
When the US takes an unmanned plane and flies it over a village in Pakistan and Yemen it does not disregard the safety of non-combatants.
Guerrilla fighters target opposing combatants, e.g. FARC in Columbia. They fight Columbian military and police forces. Guerrilla fighters can either be criminals or freedom fighters, depending on whether their opponents are mandated by a democratically elected parliament and government (upholding democratic principles) or not. So this makes FARC criminals, while the German Resistance movement led by Claus von Stauffenberg in 1944 were freedom fighters. Hitler’s “democracy” ended in late 1933.
It becomes more complicated when a democratically elected parliament and government creates laws and condones actions that violate the Universal Declaration of Human Rights and also deliberately target or disregard the safety of non-combatants. A good example is Hamas. They clearly are terrorists.