From: Denver Colorado
Do the DLC's add more to game play or are they just scenarios?
I have all DLC on my computer, but have only played the Spanish American War Scenario.
Originally I started with the full 1850 Campaign (twice) as the USA. While eventually comfortable with the day to day economic, industrial and diplomatic aspects of PON, I had, despite multiple readings of the rules, little practical experience with the actual combat mechanics. The Spanish American War Scenario allowed me to focus on warfare in general and combat in particular. Must have played the scenario five or more times - gaining more experience, understanding and confidence with replay.
Eventually I shall play them all, as the Franco Prussian War of 1870 was vastly different in numbers involved and (perhaps!) the tactics to be used. The race to colonize Africa will be my primer on colonization.
It would be wise for me to play the American Civil War scenario prior to hitting 1860...
As best I can determine, the DLC's are scenarios only - updates are introduced through the various patches.
Hope that this helps, Sir!