Someone should have asked, "Whose side will those 300,000 Afghans fight on?".
Afghanistan has been unworthy of attempts to make something of it since Zoroastrianism was replaced by Islam.
In the absence of us paying them and backing them up with air strikes they won’t fight at all, at least not against their fellow Afghanis.
The Taliban have owned that country from the start and as long as they let the Afghan Security Forces go back to their villages with their heads there’s no way they’ll fight.
That deal was cut years ago.
“...since Zoroastrianism was replaced by Islam...”
Yep, I think both indigenous sides in A’Stan support Islam.
Neither support Western Civ too much.