I already have honor written down; here are some other questions.
Does religion tend to be a big role?
Is improvement of self a main value, or improvement to your feudal lord or society as a whole?
There are lots,if you think about them for a while. Here's a few a thought of:
Respect - This plays into listening to higher ranking warriors, leaders, generals, etc. It probably plays a big part in everyday life as well, with older and wiser brethren.
Improvement to Self - This is definitely important. If war is a big part of life, there must be consequences to failure. Thus, self-improvement is a big goal to avoid loss of honor.
Sacrifice - This depends on how advanced the civilization is. It could be moral sacrifice, like sacrificing a close friend to battle. Or it could be actual sacrifice to appease whatever war deity there is.
That's what I can think of, but you might want to narrow the question a bit.
Consider the difference between trained soldiers and irregular/tribal warriors.
Soldiers fight with discipline, teamwork, and obedience to orders. These days only one in ten is actually on the front line, but the support of the other nine makes the frontline soldier more effective.
Warriors fight with personal bravery and individual combat skills. They might not find it dishonorable to break ranks as long as they run screaming towards the enemy.
One maniac with a sword will slaughter one pikeman. A thousand pikemen will slaughter a thousand sword-wielding maniacs.
Revenge is a dish best served cold. - Klingon Proverb
Klingons are depicted as a spiritual people. According to their legends, Klingons slew their own gods.
Klingons made Nietzsche right, how badass is that? Klingons will stab each other in the back to improve their own standing, that's a kind of self-improvement. However, if another species is there, Klingons are all about race before rise. They have species pride and care about the glory for the empire.