For our 60 tank match, we used airsoft pellets.
Here's how it goes:
-Both teams will have air support.
-Each tank would have a driver and spotter.
-A spotter will record the number of hits on his assigned tank. [Max hit points: 100]
-Drivers are to search and destroy the enemy tanks.
-Team wins once all tanks are disabled.
-Air support can be brought in every 30 minutes.

For the battlefield, we would usually go to the beach..
We wanted to try the fields.. so yeah...
The Leopard2s took us out within 40 minutes!
Our Blackhawks only managed to take out 6 tanks but we still lost!!!!!