What is the origin of the idiom "risk life and limb" and when to use it?

The idiom "risk life and limb" has its origins in the literal dangers and sacrifices often faced in battles, accidents, or hazardous situations where one's life and physical well-being are in jeopardy. This expression is used when describing actions or decisions that involve a very high level of danger or personal sacrifice, often highlighting the extreme nature of the undertaking.