 The rapid anti-personnel minefield breaching system and Bangalore torpedo are both examples of explosive devices used to do what?
Rapid anti-personnel minefield breaching system: The rapid anti-personnel minefield breaching system or RAMBS II is a British rifle grenade used to breach obstacles and clear minefields. Bangalore torpedo:  It is used by combat engineers to clear obstacles that would otherwise require them to approach directly, possibly under fire.
clear obstacles