The video above is the Alienation Cannon Fodder Walkthrough and shows how to complete Cannon Foddermission in Fort Itaipu, Brazil, the location featured in Alienation.
Note: The video walkthrough was recorded while playing the game on Professional difficulty, and covers the following objective(s):
Find a naval gun shell. Load the shell.
Find some propellant.
Combine the propellant.
Load the propellant into the gun.
Fire the naval gun.
Proceed to evacuation point.