Expanded wars is for command and conquer generals: Zero Hour, it adds many new factions, and modifies all of the other old Factions. You will be able to command new powers such as laser bombardment, Neutron bombs, Meteor Strikes, and Fuel Air Carpet bombing. You can be promoted 9 times in expanded wars to allow a new line of units to be enlisted into your sides army by reaching the final rank, and you can quickly change the tide of a battle with these.
This shows the new Sith Plasmalord Tank in Action. It shows the bug fix on the plasma cannon as well.