How did the nawabs and raja's …

The Indian nawabs, rajas and princes were shot-sighted. After the weakening of Mughal Empire, the newly emerged independent states wanted to extend their borders. At that time Bharat was divided into very small states after the Mughal Empire's collapse. The nawabs and rajas were involved with each other in constant conflicts. They took the help of the foreign trading companies(i.e. French, Dutch, Portuguese and British) as they used to trade modern weapons to India from West. In turn to help the states win, they demanded to trade without taxes and control over some jagirs of their empire. Slowly they became more powerful and suppressed the rulers who helped them. After some wars with other traders like French, Dutch etc., they won over them too and thus till 1857, they took control over the entire BHARAT.

As they were forced to follow rules made by Britishers and they have to rent out lands