Dynasty Warriors: Strikeforce

This is relatively simple, considering the first officer you face will be a bandit officer and not even a "Real" officer if you will. You will be alone the first time you face this officer and it could be tricky, but you will get used to facing officers and it will become easier with practice/allied officers.

My top tip would be use the downward Y attack and follow up all X combos with Y basically. Those are considered "Heavy" attacks" and do a fair amount more damage than the standard combo.

He will have a blue bar below his health bar, until you knock this out he will be able to keep attacking without being stunned. Usually when you have allied officers these are split in to 4 quarters but based on the number of officers with you, it will be split in to that many pieces and each officer does the most damage to their color. In this case it's only blue because you are most likely the only one (Unless in the online city off the bat.)

It may take a couple tries, but it shouldn't be too bad. Just play with your officers combo attacks a bit and it should be no problem. Also look in the stage for a yellow pot on the map for some health / fury which both help. The soldiers often drop health on this stage so you don't have too much trouble. Also you can change the difficulty to easy in the town settings to give yourself a little edge, but materials drop a bit less often in the easier difficulties.