(1) Personal Struggle (in the way of Allah (God) to keep evil away from yourself) (2) Holy War (Fighting a fair, defensive war - to stop oppression)
There are two types of Jihad: (1) The greater (akbar) Jihad - This is preserving ones-self from sin and disbelief. (2) The lesser (asghar) Jihad - This is going to war to defend Islam, people, property or occupation of a Muslim or Islamic country.