Once your two chosen aircraft have reappeared on the screen, they will start moving forward yet again as they come to eight 501 Fourlegs that are firing projectiles up at them from their positions in the centre of the screen; once you've dropped a bomb on each of them to kill them, eight Type 2 Air Wolves will come flying down towards you from the top of the screen while firing projectiles at you.
Once you have fired one shot at each of them to kill them five Yellow Tanks will roll out of the forest at the top of the screen, while firing projectiles up at you - and once you have dropped a bomb on each of these to kill them thirty-two more Type 2 Air Wolves will come flying down towards you from the top of the screen while firing projectiles at you.
Once you fire one shot at each of them to kill them two Type 2 Cobras will come flying down into view from the top of the screen while firing off projectiles at you from their cannons; once you fire off enough shots at all four of their cannons to destroy them, and both of their bodies to kill them, twelve more Type 2 Air Wolves will come flying down into view from the top of the screen while firing projectiles at you.
Once you have fired a shot at each of them to kill them two more Yellow Tanks will roll out of the forest on the left side of the screen, while firing projectiles up at you - and once you've dropped a bomb on both of these, to kill them, you will come to a Type 1 Mini Boat, that is firing projectiles up at you from its position in the centre of the screen.
Once you have dropped a bomb on it to kill it, eight more Type 2 Air Wolves will come flying down into view from the top of the screen while firing projectiles at you; once you have fired a shot at each of them to kill them, another Type 1 Mini Boat will come sailing into view from the left side of the screen, while firing projectiles up at you.
Once you have dropped a bomb on it to kill it four Brown Ninjas will come flying down towards you from the top of the screen while firing projectiles at you; once you fire a shot at each of them to kill them, two Green Boosters will roll out of the forest at the top of the screen while firing projectiles up at you.
Once you drop a bomb on both of them to kill them, six more Brown Ninjas will come flying down towards you from the top of the screen while firing projectiles at you - and once you have fired a shot at each of these six to kill them twenty more Brown Ninjas will rise out of the forest in the centre of the screen and start flying towards you.
Once you have fired a shot at each of them to kill them, eight more Type 2 Air Wolves will come flying down towards you from the top of the screen while firing projectiles at you; once you have fired a shot at each of them to kill them, six more Yellow Tanks will roll out of the forest on the left and right sides of the screen while firing projectiles up at you.
Once you've dropped a bomb on each of them to kill them, eight more Type 2 Air Wolves will come flying down into view from the top of the screen, while firing projectiles at you - and once you've fired a shot at each of them to kill them, six more Yellow Tanks will come rolling into view from the alternating right and left sides of the screen while firing projectiles up at you.
Once you've dropped a bomb on each of these, to kill them, four more Type 2 Air Wolves will come flying down into view from the top of the screen while firing projectiles at you; once you have fired a shot at each of them to kill them, two more Green Boosters and a Type 3 Super Tank will roll down towards you from the top of the screen, while firing projectiles up at you.
Once you've dropped a single bomb on both of the Green Boosters to kill them (and enough bombs on the Type 3 Super Tank to kill it), another Type 3 Super Tank will come rolling into view from the right side of the screen, while firing projectiles up at you - and once you have dropped enough bombs on it, to kill it, twenty-four more Type 2 Air Wolves will come flying down into view from the top of the screen, while firing projectiles at you.
Once you have fired a shot at each of them to kill them, two more Yellow Tanks will come rolling into view from the left side of the screen while firing projectiles up at you; once you've dropped a bomb on both of them to kill them, twenty-two more Type 2 Air Wolves will come flying down into view from the top of the screen while firing projectiles at you.
Once you have fired a shot at each of them to kill them four more Yellow Tanks will come rolling into view from the top and right sides of the screen while firing projectiles up at you - and, once you have dropped a bomb on each of these to kill them, you will come to a third Type 3 Super Tank as it begins rolling away from you while firing projectiles up at you.
Once you've dropped enough bombs upon it to kill it, fourteen more Type 2 Air Wolves will fly down into view from the top of the screen, while firing projectiles at you; once you have fired a shot at each of them to kill them, eleven more Yellow Tanks will roll into view from the left and right sides of the screen while firing projectiles up at you.
Once you've dropped a bomb on each of these, to kill them, four more Yellow Tanks will come rolling into view from the alternating left and right sides of the screen, while firing projectiles up at you - and once you've dropped a bomb on all of these to kill them, four more Yellow Tanks will come rolling down towards you from the top of the screen, while firing projectiles up at you.
Once you drop a bomb on each of them to kill them, you will come up to two more 501 Fourlegs that are firing projectiles up at you from their positions on a rock on the right side of the screen; once you drop a bomb on both of them to kill them, four more Type 2 Air Wolves will come flying down into view from the top of the screen, while firing projectiles at you.
Once you've fired off a shot at each of these, to kill them, two more Yellow Tanks will come rolling into view from the right side of the screen while firing projectiles up at you - and once you drop a bomb on both of them, to kill them, you'll come to two more 501 Fourlegs that are firing projectiles up at you from their positions on the left side of the screen.
Once you have dropped a bomb on both of them to kill them, four more Yellow Tanks will come rolling into view from the right side of the screen, while firing projectiles up at you; once you drop a bomb on each of them to kill them, you'll come to two more 501 Fourlegs that are firing projectiles up at you from their positions on another rock on the right side of the screen.
Once you have dropped a bomb on both of them to kill them four more Type 2 Air Wolves will come flying down into view from the top of the screen while firing projectiles at you - and once you have fired a shot at each of them to kill them eight Oumu will come flying down towards you from the top of the screen while firing projectiles at you.
Once you've fired a shot at each of these, to kill them, you will come to five more 501 Fourlegs that are firing projectiles up at you from their positions in the centre of the screen; once you have dropped a bomb on each of them, to kill them, the text of "RED ALERT, TARGET IN SIGHT" will appear on the screen as two more Yellow Tanks come rolling down towards you from the top of the screen while firing projectiles up at you.
Once you drop a bomb on both of them to kill them you'll come to five more 501 Fourlegs that are firing projectiles at you from their positions in the centre of the screen - and once you have dropped a bomb upon each of them to kill them you will come to Power Station, which is the only static boss in the game and shares its name with the third boss from Ordyne. It will attack by firing projectiles at you from its sixteen small corner-mounted cannons; once you have dropped a bomb on each of the cannons, to destroy them, you will have to drop a seventeenth bomb upon the central reactor (which will automatically be flashing red) to destroy it.
Once you have done so it will explode - and the text "ROUND 4 CLEAR" will now appear on the screen as you receive 2000 bonus points for every group of Green (and Blue) Soldiers you'd picked up during the round. Now it is onto the fifth round, which again starts in a similar way to this one, and your two chosen aircraft must yet again rescue groups of Soldiers, but they will fight the game's third ground-based boss Hyper Cannon at its end.