What is a grenade sump?

Related questions

1. Why do soldiers dig fox holes?
2. What is a Ranger grave?
3. What is the purpose of a foxhole?
4. What are rifle pits?
5. What is a foxhole in war?
6. What is a machine gun nest?
7. How deep is a military foxhole?
8. Was the machine gun effective in ww1?
9. How many died at Juno Beach?
10. Why was it called Juno Beach?

Tags

1. #position
2. #thrown
3. #themselves
4. #picture
5. #throw
6. #comes
7. #kicked
8. #other
9. #fighting
10. #where
11. #grenade
12. #troop