A pointless 20-year long war that was fought (and lost to the Taliban) by the United States of America. The purpose of the war was to root out "terror" (whatever the fuck that objective means) and to kill all brown people in the Middle East (remove the Taliban and Al-Qaeda). The war was a gigantic stain on the US and it's people, and due to the amount of money wasted on the endeavor, it will more than likely lead to the eventual economic collapse and downfall of the US itself. Just like the Soviet Union (see Soviet-Afghan War for context).
If you ever feel like you're useless, just remember that it took four presidents, 2,459 dead soldiers, and $2 Trillion dollars to replace the Taliban with the Taliban in Afghanistan.
That's right. $2 Fucking Trillion. Not enough money for the homeless, or student debt, or cancer research, or space exploration, or to help the elderly stateside. But just enough money to bomb brown people. God Bless America.
War in Afghanistan