Exhaust III

*** 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 2 turns. 

Required Squads: 2 Combat + 1 Dummy Recommended. [Could be done with 1 Combat + 2 Dummy with RNG]

Map View: due to Goliath Plus blocking the path on the bottom, we will have to go through the top route with all the enemy units. Additionally, it is safe to have 2nd combat echelon but it will likely to fight once at most. 

Move combat echelon up one, then deploy 2nd combat echelon.

Before moving on turn 2, make sure to swap and resupply as it will need to fight five more times.

Swap back to the front and move 3 to the left, this prevents helipad from being surrounded if you forgotten to resupply, giving you another location to resupply.

Move combat echelon up one from HQ so that dummy echelon could be deployed. Combat echelon near supply point move down one.

Since there is a chance that HQ could be attacked next turn, swap dummy and 2nd combat echelon as safety measure.

Combat echelon moves on top of supply point and then dummy moves one to left to finish connecting the route. All you have to do now is end turn until map is cleared.