First of all,
lego sonic, remember you can add all the links to images to the topic's info (aka OP) by using the button that says MODIFY in the top right corner
This is true, and with a link directly to the images you can even place them between img tags like this:
[img][/img]
Which shows the pictures in the topic itself, making it much easier for others to see the pictures you made of your creations!
People really like when you do that, more then having to go to another website to view them. :)
Second of all, while you seem to have your base and mostly appropriate vehicles set, remember that it looks better and plays more fun when you add some more verticality to the terrain by adding some hills or something.
Also adding some rocks or things to hide behind for people on the ground would be a wise thing since tanks can ruin everyones day on a flat terrain with no cover. :C
Just giving some tips that i had when looking at your pictures. :)