on the subject of . . . . . . . .
The game had begun even before 1829, when the Duke of Wellington, then Prime Minister, entered into official correspondence on the subject of how best to protect India against a Russian attack through Afghanistan.
In relation to
در ارتباط با، در رابطه با
در ارتباط با کسی یعنی درباره ی کسی، در حق کسی
در همراهی با ، در معیت با
in the context of
