However, given that there's no need for so many soldiers these days, as war scenarios are now fought using high-tech weaponry; for example, remotely operated cyber-controlled aircraft, robotics and drones… etc., could there be another angle to this?

Could a planned fake alien invasion be in the cards as the ultimate false flag?

Consider the millions of conscripts required to deal with such a scenario to fight on homeland. Could, for instance, U.S military conscription be part of a concerted operation tied into a covertly planned fake alien invasion?

In retrospect, what about the legacy mainstream media's many recent publications covering aliens. All on the same page, asking the same questions such as, "Do aliens reside among us?"  or, "Are they secretly working together planning an invasion…?" Then there are the numerous accounts of alien encounters from whistleblowers and ordinary people, receiving a lot of attention basically saying "They are here…"

Is this part of the conditioning designed to get the public used to and then be fooled into a hostile alien invasion threat, not knowing that the whole thing is deep-state manufactured?

Would the public be fooled?

The recent House of Representatives approved National Defense Authorization Act has made an amendment that will register all able-bodied resident males aged 18-26 for selective service into the U.S military in 2025. There are intentions to expand registration to draft women. For more on this go here.

What if these young people forced to enlist soon find themselves fighting a formidable alien foe?

Consider the resulting grave concerns for these young people from their parents and other close relatives giving their support. So emotionally struck, some losing their senses, would the nature of the fake alien foe bring less skepticism, while allowing the deep state to get away with the fakery?

Remember, to most people, a potential alien threat is thought to come from off-worlds, aliens showing up in the sky, not from underground lairs. Would an attack from aliens coming from underground really shake people, as they had not been prepared for this? How would this unexpected invasion be reassessed?