What I'm missing in your vision is dozen of short range microdrones with needles covered in neurotoxin taking off of each of the dogs backs.
The wording is callous and shocking to my modern ears but - if you start with the premise that you are already in a violent conflict (I'm not addressing the issue of colonialism here - just the debate about the comparative ethics of bullets and explosives vs chemicals) then this sentence stands out: "It is sheer affectation to lacerate a man with the poisonous fragment of a bursting shell and to boggle at making his eyes water by means of lachrymatory gas."
We have some ridiculous Hollywood-fed beliefs that bullets and explosions create clean deaths and painless injuries.
But I appreciate your irony. :-)