Pentagon privately voiced concerns about Afghan war: Washington Post

"We were devoid of a fundamental understanding of Afghanistan — we didn't know what we were doing,"

But those in power, especially those elected officials getting the largest campaign donations from the big defense industries, knew increased military spending (including subsidies - i.e. welfare/socialism for the richest - to the defense corporations) was critical to the US economy (unfortunately), and for the pols to keep the campaign contributions coming and maintain their positions, they couldn't care less 'understanding Afghanistan'.

Stop the Bush-Obama-Trump wars. Stop subsidizing the elite (so called) like Trump and his global backers and financing invasions of foreign countries. Use taxpayer moneys for to finance programs like education, healthcare, infrastructure, and others that benefit the general population.

A republican led war of choice.