The 600 is a persistent campaign for Armageddon War.
Persistent?
Yes, persistent in the sense that the outcome of one skirmish affects the following battles.
If you win a battle, your next engagement will be different than if you lost the battle.
Additionally, you must not only defeat the enemy in each encounter, but also preserve your force to fight in the next. This is the prime difference between a one-off scenario and this campaign. You will, however, have help as you strive to hold your mechanized battalion together. Between each scenario in the campaign you will have the opportunity to refit your force. The cost to do so will be the Glory Points (GP) that you have earned.
Glory Points earned during the scenario may be spent to refit and upgrade your forces. Note that even though you may lose a scenario, you can still use your accumulated Glory Points to refit your forces.
—description from the publisher