Too many female prisoners, a special forces soldier transmigrates and marries wildly.

A special forces king transmigrates into the body of a lowly soldier in an ancient border army. The border army has a "merit-based wife reward system"—for every ten enemy soldiers killed, one can be chosen as a wife. Using his modern special operations knowledge, tactical thinking, and physical advantages, he selects three female prisoners as wives on his first try and takes them home…
This was during the final years of the "Great Yan Dynasty," a time marked by both border troubles and internal strife...
This was the era in which he made great strides, achieved great feats, and dominated the world...