When nations engage in war, they create a great deal of collateral damage. This is not justice but punishment. We can see how badly this is happening in Syria.
If you read the entry just before this one, you can see that "The Galactic Police Force" would attempt to isolate the bad guys from the good guys and take them into custody.
Gort, the galactic policeman (See the last blog.), would be able to target the weapon systems of the combatants and disintegrate them.
The Police Force would also have to take out nuclear and extraterrestrial weapons that might be used against them or the human race.
The police force has the most advanced psychotronic weapons in the galaxy. It's literally fitted to attack certain types of adversaries like destructive AIs and negative ETs.
Humans would not be harmed by this weapon. Against AI it would act like a virus. Against other adversaries, it would collect images of what they wanted to do to others and then boomerang it back into their minds as strong delusions (You will reap what you sow). You might call this the Twilight Zone/Holodeck weapon.
The enemies of mankind may try to use parts of mankind like hostages or human shields. It takes intelligent planning to get around this and take out the enemy without harming the hostages like in the TV series "Flashpoint".
Joan Baez's I Shall Be Released
Michael Jackson's Heal The World
St Johns