Alex and the others killed the rest of the soldiers. Because they had lost most of their comrades, including their leader, Alex's group managed to kill them pretty quickly, especially for Anna and Fabio, who were Martial Lords.
Alex finally felt the difference between humans and monsters. Luckily, this time they managed to surprise them with their prowess. If the leader knew about their power and approached them carefully, it would be a hard fight even with two Martial Lords in their group.
After all, quantity sometimes could win quality. Anna might be able to deal with ten peak Grandmaster simultaneously, and Fabio was also around that number. Of course, all of the soldiers were not a Peak Grandmaster. Most of them were in 3-7 Star Martial Grandmaster.
Most of all, because of their number, they recklessly underestimated Alex's group. Alex took advantage of it and made a series of combination attacks.