 
 <prompt> Two advantages of the underground tunnel and bunker system were that the bunkers fit fit dey reoccupied afta dem don knock dem out and wetin again? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: From early 1944 reach the days wey dey lead up to the invasion, Kuribayashi transform the island into one big network of bunkers, hidden guns, and 11 mi (18 km) of underground tunnels. The heavy American naval and air bombardment no fit do anything but make the Japanese go further underground, making their positions strong against enemy fire. Their pillboxes and bunkers dey all connect so if one dey knocked out, dem fit occupy am again. The network of bunkers and pillboxes dey heavily favor the defender. 