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.
Since the formation of the United States, the country has been involved in twelve major wars spanning every continent. Reddit user Flynavy88 has created a chart documenting the total U.S. casualties suffered in each of these wars. Flynavy88/Reddit. U.S. casualties spiked drastically during the Civil War and World War II. Each of those wars claimed over 1 million U.S. casualties apiece.