What are the key aspects of German self defense laws?

In Germany, self-defense laws allow individuals to use reasonable force to protect themselves or others from harm. The key aspects include the requirement that the force used must be proportionate to the threat, and that individuals have a duty to retreat if possible before using force. Additionally, self-defense can only be used as a last resort and must be necessary to prevent imminent harm. It is important to note that self-defense laws can vary depending on the specific circumstances of each case.