HOW TO: Age of Empires 3 Hard Difficulty – Act 2 Mission #3: The Rescue
The Iroquis are under attack from the British, and John Black will fight them back.
In this mission you will have to balance off defending forces for the Indians in the north, and attack units in the South.
The best possible unit to get in the north is going to be the non-mantlet aboriginals. The reason is because you can only make a certain number of mantlets and a certain number of aboriginals… and you will want the mantlets for your attack.
Your first inclination will be to rush in there, don’t. Your second inclination will be to move directly from the south, don’t.
Instead get a slightly better economy and head east and then north. This will give you access to another aboriginal village. Build a trading post here and this will double the number of aboriginals you can support in your army. You will want to build all mantlets from this one.
All the while you will be building an army of ranged aboriginals in the north. Make sure your units are positioned near your tower so as to get maximum defensive bonus. The AI on the cannon usually just attacks random buildings so leave that until last.
While this is happening amass a maxed out aboriginal army in the east and once you are maxed out (on the number of mantlets) push west with this army. There will be two unupgraded towers here you can take out. Once you start attacking they will pull back. From here you should slowly inch forward wiping out any workers you can.
All the while instead of reinforcing from the east you should start building up an army in the north. The second that your army gets close to the northern tower you move your northern army forward to support and link them up. From here it is simply a matter of destroy all remaining buildings with your army.
For help on microing units properly and what your economy should look like watch the VOD.