I don't see that there was any need to invade Afghanistan in 2001, but it's debatable. The reason I say there was no need was that the nation and government of Aghanistan did not attack the USA on 911. A hidden group of international conspirators attacked the USA on 911. It was therefore a police matter, not a military matter, and to respond to it with an all-out military attack on another nation was totally inappropriate. But like I said, it's debatable...

As for Iraq, there was definitely no need to attack them in 2003. They didn't cause 911. They posed no actual threat to other countries any longer at that time. Their own country is immeasureably worse off for having been invaded and occupied, and would have been far better off if it had never been invaded by the USA and Britain, and if sanctions had been lifted following the Gulf War which effectively ended Saddam's ability to threaten his neighbours. That was way back in 1991. That should have been the end of it right there.