Vieo said:
You're allowed to pretend the war never happened in creating or writing about a character?
Certainly, the war happened (assuming the DM is using the default premise), but remember that the war didn't necessarily happen
for that character. As Maverick Weirdo suggests, not only were there areas that saw little or no action, but even among Breland, not every single able-bodied male or female saw action - there's plenty of room to hide, as Eberron's detractors are quick to point out (the continent has something like a 5% population density

) So you could have:
--dirt poor in the depths of Sharn who were never called to duty
--people in the outlying territories who didn't get involved in war
--deserters who ran to the country to escape
--people whose families were important enough to buy them a pass from serving duty
And of course, the war veterans themselves. For that matter, even if a character served in the war, his simple response could be, "I don't want to talk about it," and if you want, just provide cryptic snippets when desired about life in the war. (Think Firefly or Serenity's Zoe and Mal, if you ever watched those.) So there's plenty of room to fly in this setting.
This seems to be the opposite of the Forgotten Realms philosophy where a character can be as open-ended (within the limits of the ruleset) as you want him to be.
Well, looking at it from another angle, Forgotten Realms is limited, in that you can't have anyone whose background was from a continent-wide war, either
(well, unless you count Maztica).
(And for any FR buffs, no, the business with the Golden Horde doesn't count to me, because no one west of Cormyr felt it at all, from what I saw).