Given the task definition and input, reply with output. In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.

after napier initially gained military control of the region by forcing an agreement with the sindh amirs , his forces attacked the fortress at imamgarh.
after napier gained military control of the region , by forcing an agreement with the sindh amirs , his forces attacked the fortress at imamgarh.