 To justify his plan , the Governor-General of India Lord Auckland issued the Simla Manifesto in October 1838, setting forth the necessary reasons for British intervention in Afghanistan.
<clarity>  To justify his plan , the Governor-General of India Lord Auckland issued the Simla Manifesto in October 1838, setting forth the necessary reasons for British intervention in Afghanistan.
 As a prelude to his invasion plans , the Governor-General of India Lord Auckland issued the Simla Manifesto in October 1838, setting forth the necessary reasons for British intervention in Afghanistan.