did you participate in the beta?
yes: it was required to uninstall the entrenchment beta then reinstall the full version of entrenchment "upgrade from beta to 1.0 doesnt work "it'll give you a warning that theres a mesh problem when trying to join an online game"
"tough not adressed properly i only barely read something about it on the forum... as i was just about to upgrade from beta to 1.0... if i werent reading the forum during entrenchment download i wouldve missed it....."
im not sure what happens on singleplayer, tough it might be a likely cuase
if you didnt participate, something might have gone wrong during installation, reinstall sometimes does wonders....
if it doesnt apply to you.. or reinstall didnt work then i hope someone will have some other idea's abotu the problem