Compression I

*** It is important to be flexible in mission due to Girls Frontline does not have fixed enemy movements. So adopt accordingly.****

Clear Condition: Establish Supply route and maintain it for 3 turns. 
Required Squads: 1 Combat + 1 Dummy

Map View: Looking rather complicated but it's simple map to clear using power of Hydra tank. 

Combat Echelon swaps with M4 unit then moves all the way to radar node, which activates the Hydra tank as ally. End turn and you will also surround capture helipad next turn. M4's command should be set to "wait"

Move combat echelon between Hydra and M4.

Spawn the dummy echelon at the helipad. Now we are going to move M4 out of harm's way by swapping. Also make sure that Hydra Ally is set to "Wait" command.

The end result is that M4 will be on helipad next to radar node. Then we are going to Move Hydra ally all the way to HQ by Swapping as well.

We are almost done, now we have to make sure that dummy echelon is also out of harm's way. Swap with Combat echelon and we should be set for this turn.

Make sure that Hydra Ally is set to "Wait" Command before ending the round. Double check!

All that remains now is moving combat echelon to connect the supply route.

All you have to do now is defend the node that is threaten by the enemy units that can break the route. Afterwards map will be cleared.