PTSD may follow after what kinds of event/s?

Natural disasters and serious accidents, military combat and terrorist incidents, and violent personal assaults and sexual assaults. Virtually any trauma, defined as an event that is life-threatening or that severely compromises the physical or emotional well-being of an individual or causes intense fear, may cause PTSD. Such events often include either experiencing or witnessing severe accidents, physical injuries, war combat, natural disasters, terrorist attacks, abuse, or involvement in civil conflict.