Starfleet has been about MAD (Mutually Assured Destruction, for you kids) and scorched-earth for over 100 years.
General Order 24:
An order to destroy all life on an entire planet
. This order has been given by Captain Garth (Antos IV
) and Captain Kirk (Eminiar VII
). On neither occasion was the order actually fulfilled. (TOS
: "Whom Gods Destroy
", "A Taste of Armageddon