system
Given the following post, respond as if you're commenting on Reddit:
human
[General Sci Fi] I am attempting an invasion of Earth. Where would the best landing site for my Expeditionary Corps be?

A little about ourselves: 

We are the 1st Coalition Expeditionary Corps and we are hoping to take back the Earth. We have 30,000 military personnel at hand and have advance technology (such as aircraft that can be flown in both space and within a planet’s atmosphere and advance 3D printing/artificial resource production technology). 

So where in the entire world would the best invasion site be to establish a foothold for the rest of our force to come and help assist us?  

Edit: I forgot to mention that *we* are humans looking to reclaim our home. Earth has been ravaged by war waged by our great grandfathers against giant monsters called “Kaiju”. The earth is populated by no one but colossal sized monsters the size of sky scrapers who are essentially biological terrestrial walking/breathing WMDs.
gpt
Nowhere. You have the ultimate high ground already. Destroy all hard targets from orbit, where you can easily evade any possible retaliation. Secure surrender from all relevant parties and send only small delegations to the surface to transition to your absolute rule. Don't build a surface base until the situation is stable and has been for a long time.