There is some very good info (at least I think it is) at the enclosed link if you're up to reading about it.

Some instances of one-time trauma.

• natural disasters (earthquake, flood, hurricane, etc)
• rape
• assault
• muggings
• robbery
• accidents (automobile, airplane, train, etc)
• fires

Some instances of prolonged trauma.

• physical or sexual abuse as a child or spouse
• war
• life in a prison camp
• life as a refugee
• hostage situations
• life in a concentration camp
• life in some religious cults

http://www.palace.net/~llama/psych/trauma.html