What did one signal fire and one gunshot warn was approaching the wall? 1 up to 50 men 2 about 100 - 500 men less than 10 men more than 500 men

The answer is **2. about 100-500 men**.<br /><br />This signaling system is often attributed to historical military practices, particularly those involving the Great Wall of China. While the specific numbers might vary depending on the era and location, the general principle was that a single fire or shot signaled a relatively small raiding party (less than 50 wouldn't typically warrant a signal), while escalating numbers of signals indicated progressively larger forces. Two signals would therefore indicate a significant threat requiring a more substantial defensive response, typically a force somewhere between 100 and 500.<br />