I am in favor of any war which defends our country or the rights of it's citizens. I am opposed to any war which has any other purpose. And I am well aware that people in favor of nation building and adventurism will aways attempt to paint their favorite wars as doing those two things. Some are tricked, I am not.
Therefore, I support WWII and the War against Afghanistan. Off the top of my head I can't think of any others.
I think there are interesting contrasts and analogies that can be made between those two.
For example, the attack on Pearl Harbor by the Japanese and the attack on the WTC/Pentagon by Al Qaeda based in Afghanistan governed by the Taliban.
Hitler's declaration of war on the US after the Japanese attack and our status of a "hot" cease fire with Saddam's Iraq (including Saddam's provocations after the cease fire was put in place), and Saddam's reaction to the WTC/Pentagon attack.
Our adventurism in Africa and Europe as part of the WWII alliance, and our adventurism in the Middle East as part of (and leader of) a NATO alliance in Afghanistan and a (rouge, from world government's view) coalition in Iraq.
I think there are analogies and contrasts with the wars I imagine were intentionally left off the list:
Our intergenerational commitments in Europe and Asia in national building as victors in WWII combat, our intergenerational commitment to South Korea, Bosnia/Kosovo, and our predictable intergenerational committment to Iraq and Afghanistan. Another interesting contrast might be our intergenerational commitment to what might be called anti-nation building toward Vietnam and Cuba.
So much to consider...so little time to debate....