Re: Tanks - No. Let me explain, in order of importance.
1) In my opinion (I'm not alone, but that's a big qualifier), the nature of modern war, with it's tight environments, abundance of neutral targets, and the prevalence of armor destroying weaponry, has rendered heavy tanks not just obsolete, but a costly liability. Tanks were made for a specific purpose - breaking and exploiting battlelines. Wars just aren't fought like that anymore, and the tank is rapidly going the way of the lances and catapults. When I came up with this idea, I wanted to show off my interpretation of the future of warfare, warts and all (especially warts really), and tanks just don't fit in there.
2) The conflict I've described, of the South Pacific breaking into factionalism and anarchy, doesn't leave heavy armor with much to do. The terrain is all wrong, there's no threat it's needed for, and the logistical needs of transporting tanks outweighs whatever benefit tanks would offer over lighter, more specialized systems.
3) I specifically wanted to focus on the grim business of infantry combat, and the unit the players constitute is a Mechanized Infantry battalion, not Armor or anything else.
So it's an infantry focused unit, in an infantry focused war, in an infantry focused game.
However, for people (Strife) with an armor fetish, there will be other options. For clarity, each player commands a full Company of five Platoons. Each Platoon is a purpose-oriented unit - various breeds of infantry or support vehicles. Most of the vehicles will be updated versions of modern stuff, including things like the Stryker Gun System and the AML-90. Not tanks no, but vehicular firepower. And yes, there will be stuff just for riots.
Reporters and such is a whole other can of worms I'll mess with later, when my degree isn't in jeopardy.