Blanchflower
Prince
Try this,
1) Buy the XCom Squad in Salvador - move the Bazooka out and then Promote it only with Rough+Heal.
*) Next turn - So that you can parachute the squad right after you declare war in the same turn
2) Move the Tank out of the fort across the Wall and into Indonesia's territory on the Banana Tile - and then, send immediately back into the fort. This is to declare War.
... ...
And thank you, @Zyxpsilon
A Indonesian soldier is occupying the banana tile.