Why do you think trench warfare is no longer a prevalent as it was in world war i

We have GPS guided missiles big enough to knock out entire city blocks and can see you with infrared or night-vision cameras 30,000 feet in the air and rain down 30mm cannon rounds at 3,000 rpm or fire a volley of incendiary missiles and burn you out of the trench and then blast you to hell and back a few dozen times.

here you go hope it heps "horace mann"

answer; i believe the two groups were irish immigrants and chinese immigrants;