The order has been working very hard for a long time to get rid of all the threats that can potentially destroy our planet. This includes the powerful and long gone Frost Giants that almost made earth their home. This was something not to be tolerated and that is the main reason why the order had to use drastic measures in the ice wars of 1876. There were a huge number of people in very powerful positions that understood just how critical it was for nuclear warheads to be used in order to obliterate these giants.
The use of special nuclear missiles was something that needed to be implemented and that is the reason why the wars became so catastrophic and caused so many human casualties. The Frost Giants that survived left the planet and according to our sources they are far away from our solar system at this point. The order then eliminated that pesky nuclear radiation.