Let's Play UFO Aftershock 48: No Time to Rest
The missions against the wargots rarely ever slow down, there's some merit in starting to train up people who have similar skills to your main team in case any of them are seriously wounded or worse, killed. Having a B team can certainly he helpful as eventually things will go wrong and you need to be ready for that.
That said you can always hire half-decent replacement soldiers from the factions on Earth if you have good enough diplomatic relations with them so unless you take an aggressive conquering stance to gaining territory you should be alright. I'm actually curious if people have played the game like that, conquering whatever they want and likely facing attacks from the factions in return.
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At present, Kikoskia has 779,254 views spread across 165 videos for UFO: Aftershock, and roughly a days worth of UFO: Aftershock videos were uploaded to his channel. This is less than 0.80% of the total video content that Kikoskia has uploaded to YouTube.