To quote Will Smith, "Welcome to Earth!"

Cut off from the rest of humanity, Grayson and his ragged band of survivors have to figure out how to keep fighting before they run out of food. A quick run to Earth reveals that the fleet has been more or less wiped out, Lankies rule Mars, and (unsurprisingly) Earth Command is full of assholes who are trying to flee with a secret fleet.

Grayson darts back and forth, collecting more units and making a desperate run to retrieve his fiance, a dropship pilot, while teaming up with Russian stereotype Dmitri (or a name identical to Dmitri, maybe Boris?). They arrive back at Earth, and in a desperate fight kill a Lanky scout (remember, an 80 foot tall alien) in Detroit with the help of a local militia, the Lazarus Brigade. Turns out that the projects are run by a fair and just veterans/citizens militia, that does what the government won't. Grayson and his friends decide to stay on Earth and keep up the fight, even if it seems hopeless.

This third book reveals three major things. First, Lankies are just boring to fight. They're both overpowering and dumb. Fighting them is like battling the tide. Second, Kloos has literally no idea how politics work. Given what he's described of the NAC, a group like the Lazarus Brigade is basically the last type of resistance that'd form in the slums. Third, Dmitri isn't even a cheap Russian stereotype, he's a cheap Soviet stereotype that'd make Ivan Drago blush.

There must be something to these books, because I read all of them in as many days, but they are okay at best. For MilSF popcorn, I'd recommend the Lost Fleet series.