Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.

After the mutiny Following the Indian Mutiny of 1857 - 58 and the consequent abolition of the East India Company, its European regiments were amalgamated in 1860 with the British Army, but its ' Native ' regiments were not.
After the rebellion which happened after the Indian Rebellion of 1857 - 58 and the blockages of the East India Company, its European units were united in 1860 with the British Army, but its ' Native ' units were not.