once again, it wasn't a few hundred, it was thousands of troops. They also occupied other countries themselves (look at the pics from singapore and the Philippines). They fought in Europe and against the US. That has nothing to do with british colonization of India. Also remember, the British had promised to free india after the war (as they did).
IIRC, the British had promised the Indians dominion status(like that granted to Australia, Canada, etc), if they fought on their side way back in WW-I. They never did so back then, and the only reason why they quit India in 1947 was because they were too weak to hold on to India after the severe damages they had incurred in WW-II, notwithstanding American and Soviet pressures against colonialism.
Here's an excerpt. Please reply if you find anything odd or falsified herein (whitewash included):
http://www.indhistory.com/lord-irwin.html
In May 1929 the Labor Party won the most number of seats at the General Elections in Britain. They did not have an overall majority but formed a minority Government. Ramsay Macdonald became Prime Minister and Wedgewood Benn the Secretary of State for India.
Lord Irwin visited London to consult the new Government. It was known that the Labor Party was more sympathetic to Indian aspirations.
Soon after his return, the Viceroy Lord Irwin with the consent of the Secretary of State for India, Wedgewood Benn made a momentous announcement. He stated that a Round Table Conference would be held in which the British Government would sit with delegates from British India, and the native states to discuss India's constitutional progress. He envisaged that the natural issue of the conference to be Dominion Status for India.
Gandhi and the elder statesman of the Congress Party welcomed the statement.
However, Lord Irwin was soon to retract the statement. His promise of Dominion Status raised a howl of protest in London. Led by his predecessor Lord Reading, the Conservatives and Liberals combined to condemn the Viceroy. Although Wedgewood Benn defended the Viceroy the minority Government had to defer to the majority pressure exerted by the Conservatives and Liberals in combination.
As a consequence the Viceroy Lord Irwin was non-committal when Gandhi met him to seek clarification. Lord Irwin merely said that he could not prejudge the final outcome of the Round Table Conference. In other words there was not going to be any Dominion Status for India.
The change in the attitude of the British Government did not leave the Congress Party with much choice. At the annual party convention held in December 1929 under the presidency of Jawaharlal Nehru it was decided to launch a campaign of civil disobedience in the pursuit of complete independence.
What country are you originally from?