Much like the last through walkthroughs, first a little bit about the history of the Indian revolution.
After the Dutch rebelled against the Spanish their first move was to acquire territory and become a real empire, which they did. The French and British saw a need to maintain their positions in the world and so they worked to help carve up India. The giant land of India (modern day Pakistan, India, and Southern China) was a vast land ready to be conquered.
India was home to a giant expanse of mountains that cut off villages and created multiple small empires in the area, yes India was a split nation of people. The Europeans used these inter-country differences to carve out the Indian empire and use them against each other.
As British dominance grew in the seas, the Dutch Empire vanished. Various wars with the French with the help of the Germans left the French weak. This gave Britain the opportunity to take control of all of India, all of China, half of Africa, Canada, and many Middle Eastern lands.
The British were the world’s bastion of power. In order to maintain this power two company’s were created. First was the Hudson’s Bay Company which was responsible for running the country of Canada and maintaining the fur trade. The British East India Company was created to maintain the flow of spices and resources out of India. This company was the effectively government of India up until Ghandi became Prime Minister.
In between this period was the Sepoy rebellion. This was the first crack in the British Empire. It sent a message home that they were not the noble rulers they thought they had been. The Sepoy rebellion set the East India Company back quite a bit and fed into a future determination of a nation of people.
In the Ghandi peaceful rebellion most of his supporters were wealthy descendants of Sepoys. Instead of just killing off all of the Sepoys it was determined they could bribe these people with new positions of power.
On to the game. In this mission you have to destroy Saltpeter sites and recapture the main trade route on behalf of the East India Company.
To do this you will want majority Sepoys and Elephant artillery.
The goal to this mission is to make a strong economy. This will be tougher than in previous campaigns because the Indian worker costs wood instead of food. This means you will need to have a lot of wood production which means you’ll have tones of ability to make buildings but less ability to make units.
To deal with this you can take in wood shipments and have your harvesters gathering gold and food instead. With this approach you can make a lot of harvesters and grow a large army very quickly. This tactic will pay off in future missions as well.
It is a good idea to take out and capture the southern trade post (just east of your base). This will give you a tonne of resources that will pay off. If you build a Keep here it will stay protected for most of the game.
Do not go north from there. It is an ambush.
Instead head north and west of this ambush and you will be able to take out the heavily guarded middle trading post. At this point it is largely pointless to capture these. They will get destroyed very quickly unless you guard them with a lot of Keeps.
Instead just continue north to the main stronghold. Once the stronghold and his unit producing abilities is destroyed then you should build up all the trading posts. Until then he will keep sending armies at you.