Sorry for the delay, holidays really are keeping me busy. To answer your question you need to find the Tactics Instructor for the city you are in, this may require you to fly back to your home city that has all the major hubs.
If you are in Velika use this link and click on locations, the area that you are looking for is called Legion of Arms and it should be marked with a 15 on the map, head that way to find all the instructors, the one that you are looking for is Coldren [Warrior Trainer]
hope this helps ^_^