can any 1 post a link to where I can find new unit descriptions in the game like mech inf and tact bombers etc.
If you’re talking about how the units function, you’ll find them in the “Unit Profiles” section of the Europe 1940 and Pacific 1940 rulebooks, which are downloadable here:
http://www.wizards.com/default.asp?x=ah/downloads
If you’re talking about what the units look like, consult the Piece Directory table at the back of the rulebooks, or for large and more detailed silhouettes click on the charts in this thread to expand the pictures: