Woot! Loved that welcome.
I agree with the near term reasons for colonisation.
Who ever it was who said it was right. When the Lucifer was destroy, mankind had only been exploring space for about 16.5-17 years. Id say that about 2/3s of HTAs resources were in Sol at the time - thats what caused the post-war depression in the GTVA systems. Victory in a war between the GTVA and EA could only be one by either a Sudden Death opperation, or a War of Attrition that lasts Decades if not centuaries (like in Colony Wars).
As for Beam WeaponaryIn FS: The Great War & Silent Threat, only the Lucifer and Hades had beam weapons: The EA has the Lucy's remains and could probaly have developed beam weapons from them and also from any siezed GTI documents in Sol.
The Hades had beam turrets from GTI's long studies of Shivan tech. My postulation is that the Hades destroyed was the prototype and that they had plans to build a whole fleet.
I mean:
Q) what is more deadly than a single Lucifer?
A) a whole Fleet of them
Note: This ignores all later ships like Colossus, Sathanas, Gigas , etc...
The GTVA most likely developed beam cannons from the Hades' wreckage and GTI's research notes. So in Theory both sides should have Beam Weapons.
Also No offence to any Americans reading this:
The EA can be compared to the USA of present. USA was i colony that separated from the BE, Sol was separated from GTA/GTVA (I know Sol is GTA home system, but Just bear with me). After years of fighting (Civil war, WWI, WWII, Vietnam, Both Gulf Wars, Afganistan, and several others Im sure), America has become a Veritable Empire in all but name, just like the EA. And just like the EA would refuse to give up that power.
I say again, No offence to any americans who read this IT'S JUST AN ANALOGY
But in other news, what is INF SCP's Current Status and that of INFA 2