The Mithril Alliance consisted of five major families, so their expedition team was a bit larger in size compared to the other three factions. However, due to the fact that they didn't possess any Life Potions to heal their wounded fast, their fighting strength was now less than half compared to their full strength. Thus, the two consecutive battles caused the greatest harm to them out of the four factions. Now, they were almost equal to the other factions in terms of numbers, but couldn't match them in terms of power.
Claus could totally imagine how it would've looked like for the Caesar Family if he hadn't gotten the Life Potions from Lin Li. The damage from the battle just now would have been so immense that his faction would be forced to quit this expedition.