i reckon you ought to see the orders the original settlers were under - they were not to interfere with the local tribes and phillip gave explicit instructions to treat them kindly and to leave them alone
hardly an invasion and a military action.
the "invasion force"
All told 1030 persons went ashore, of whom 736 were convicts, including 188 women, the rest marines and civil officers, 27 with wives, and 37 children. These people formed the human material for a gaol and not surprisingly were placed under a form of government that gave an unusual amount of power to the governor.