It was the reason why the advanced level adventurers went all out when Shin went to the guild for the first time before.
Of course, the damaged countries wouldn’t just sit and do nothing either. They set-up every possible type of security and also set up patrols to protect the people of their own country. The greatest problem was that the monsters breaking through the haze had abilities that far surpassed the commonly known monsters. In most cases, coming into contact with the enemy would result in either annihilation or retreating, even with enough battle capabilities from allies.