I'm just curious how you're still holding up against four armies at once.
You aren't that advanced.
You aren't that highly trained.
And there's no possible way that you could have that many soldiers left, when literally millions of other soldiers are invading you at the same time.
Keep in mind that the New Manhattan soldier's training program would make you stuff your pants the first day of bootcamp, now imagine how hard it is to get into NMSSDA
As for your gasses, all New Manhattan soldiers are equipped with standard issue gas masks. Maybe if you went to my OP and looked at the pics of your average soldier that I added a while ago maybe you would have known that.
EDIT: Adressing issues with shrapnel, your average kevlar vest could easily stop shrapnel without causing any damage to the soldier, and I'm calling bullstuff on the mines that you ever so conveniently planted on the beaches. We also have mobile SAM platforms as well as artillery platforms bombing the forget out of you as we speak, the entire time, with the same stuff you throw at us, and you choose to completely ignore it as well. Your mechs are extremely OP as well, and claim that they are better than the NGET mechs when really they are both equivalent in power, only they have different weapons. Added to that, considering your chances of surviving a full on assault from THREE DIFFERENT COUNTRIES and a group of HIGHLY TRAINED mercenaries, would lower your soldier's morale a forget ton. I'm still wandering how you are still alive.
EDIT2: @ Miko's cruise missiles, SAM's open fire on the missiles as soon as they are in range, taking out about three quarters of the entire barrage, while the remaining missiles strike multiple battleships of New Manhattan's and Olvaia's, damaging them heavily. Jets are scrambled to deal with the submarines, but it would seem it is too late, as they are already gone.