San Francisco International Airport (SFO) FAA Status: Advisory Due to RWY-TAXI / CONSTRUCTION, there is a Traffic Management Program in effect for traffic arriving San Francisco International Airport, San Francisco, CA (SFO). This is causing some arriving flights to be delayed an average of 47 minutes.
I'm fairly sure that I could get over a thousand wars in Europe in the last Millennia or so. So I'd say that there have probably been between 10,000 and 250,000 wars in human history. I'd expect a log distribution with very few wars with more than 100 million participants and a great many with fewer than a thousand.
Second, we're limiting the list to America's foreign wars, so battles fought on U.S. soil (such as the Civil War) or on it's borders (the Mexican-American War) are not included. None of these wars were longer than the Afghan war, anyway.] Here we go: 1. Afghan war. October 2001 to 2016 ~15 years; 1,806 U.S. troops killed in action ; 2. Vietnam War