EDF 6 M 115 The Big Day †††††††† - Fast & Slow - Ranger Inferno - Earth Defense Force

The cannons spawn when you reach the embankment. Destroy 1 of the 2 completely to trigger a second set of cannons. If you reduce the first set to stumps and leave them, the second set won't spawn.
Or you make a beeline for the Ring's weak spot and end the mission quickly. That's easier in online mode, where some players can keep the enemy busy, while the rest goes for the Ring.

Ranger - Hard
   • EDF Earth Defense Force 6 Mission 115...  

0:00 Fast
6:34 Slow

EDF Earth Defense Force 6 - The Hard Way Up
   • EDF Earth Defense Force 6 - The Hard ...  
EDF Earth Defense Force 6 - Farming
   • EDF Earth Defense Force 6 - Farming  
EDF Earth Defense Force 6 - Main Missions
   • EDF Earth Defense Force 6 - Main Miss...  
EDF Earth Defense Force 6 - DLC 1
   • EDF Earth Defense Force 6 - DLC 1  
EDF Earth Defense Force 6 - DLC 2
   • EDF Earth Defense Force 6 - DLC 2  
EDF Earth Defense Force 6 - Online Main Missions
   • EDF Earth Defense Force 6 - Online Ma...  
EDF Earth Defense Force 6 - DLC 1 Online
   • EDF Earth Defense Force 6 - DLC 1 Online  
EDF Earth Defense Force 6 - DLC 2 Online
   • EDF Earth Defense Force 6 - DLC 2 Online  
EDF Earth Defense Force - Helicopter Fun
   • EDF Earth Defense Force - Helicopter Fun