Land of the Dead IS three years after the outbreak:

[Dawg]

The reason I know? Someone mentioned that they only recall dude working for Kaufman for three years. Okay, but when Riley goes to pick up his car in the beginning of the movie, the guy at the garage says, "What car? The last car drove out of here three years ago."

:dead: Dawg

[glsjaw]

it might of took Kaufmann a couple of years to come to power and barricade the city

[kar98k]

i was wondering how Kaufman came to power, and how did he barricade the city and keep out the zombies?

[Rottedfreak]

He didn't the people did, Kaufman just took over the place he's more a management type guy then leader.

[DjfunkmasterG]

actually management and leader are kind of the same thing in his position.

[FleshMask]

This is a repeat topic....

Like I meantioned before...

Cholo said he worked 6 years cleaning up Kaufman's trash...
So it would probably be longer than 3 years...