meh... this is not how modern warfare is conducted. You don't win a war by killing all enemy soldier in the battlefield, you win the war by persuade the enemy to stop fighting. Shock and awe. Use your overwhelming power to kill maybe ten or twenty percent of the enemy soldier, shock and awe them hard then let the rest of them retreat to lower, not only the rest of the soldier but also the rest of the enemy population morale, so that they can pressure the government to stop the war. Then you finish the war in the negotiation table.
At least in GATE, the Japanese at trying this tactic first before going into all out war with Zorzal.
For anyone who keep saying this is JSDF propaganda, that's the funniest thing i read in the comment section. JSDF definitely don't want people to see them as an army that doing a massacre to technologically disadvantage enemy. But if you say this is written by Japanese right-winger, well, i definitely can agree with you.