It seems I mad somewhere a mistake in numbering the 3th world, but what the heck. So here comes the 43th levels description.
There will be 2 enemy, and both will strike agains You. You can not believe how I hate to fight against more than one opponent...
So PLAY THE GAME SLOWEST, and keep an eye out observing where the C. builts, as it can develop its buildings very fast. I made the mistake once letting out the controll and I had to fight very hardly

.
But here is the perfect GUIDE: turn immediately everyone blue. Bulid a fake house next to the blues(

) then the greys. Then keep them buisy with other houses. As the C. don't immediately attack these houses and there will be a lot of them, so just build them, turn the carpenter to a soldier for maximum effectiveness (the houses won't collapse, just being ruined).
What You should bulid: a maximum red house and a helipad, than a science lab to incrise further your birth rate (with the rabbit - and to invent the heli faster.
Than to use the heli for the basics you will need the two barracks. If the C. is out of controll you will need a third too. Beware, and do not let anyway the C. build grenades (L2 green).
In the end bomb thm to the ground. If there are a lot of enemy building than bomb and capture them systematicaly (in sectors, do not care on the sizes).
It is important, that you do not need to conquer these buildings, just capture them. Put in 2 soldiers, and you won't lose them.
So that's about it. We are over the half of the game!