Why did the East India company employ its own Army and Navy, separate from England

The company used its armed force to subdue Indian states and principalities with which it had initially entered into trading agreements, to enforce ruinous taxation, to carry out officially sanctioned looting, and to protect its economic exploitation of both skilled and unskilled Indian labor.

This was because it began with a rebellion by Indian troops (sepoys) serving in the army of the British East India Company. British rule in India was handled by the East India Company. ... The British preferred to think of the rebellion as a mutiny because this word disguised the huge scale of the rebellion.

Explanation:

"the sepoy rebellion was the result of many, many influences and stressors on the cultures of india living under british rule. in britain, it's called the sepoy mutiny on the indian mutiny, but in india, it's called the first war of independence.

the main reason is concerned to the british paramountcy , the belief in british   dominance in india political, economic and cultural life had been introduced in india about 1820."

"they were forced to grow crops that benefited the colonizing nations instead of feeding their own people."

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explanation:

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.