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Objectives: Build a Shipyard and 4 Oil Platforms
There’s no need to worry about ground forces for this mission. Get your economy up and running and then construct a Shipyard. Build 4 to 6 Elven Destroyers and claim the Oil Patches. The Orcs will have claimed at least one Oil Patch so you’ll need to destroy their Platform before building one of your own. Once you have the four Platforms and the Shipyard the mission will be complete.