Google “Tripoli” as in “the shores of Tripoli…”
Prez Jefferson authorized the pursuit of pirates (of the Barbary Coast), which led to the capture of the USS Philadelphia by the Pasha of Tripoli…which led to naval engagement…which led to the death of…wait for it…pirates.
Why does the chart stop at McKinley? It's like the author wants to diss the current Prez at the expense of the hallowed history of the Marine Corps…is that it? Why do you have our service men and women? History-phobic illiterates!

I thought Navy SEALs did the killing…

Hmmm I wonder how one would kill half a pirate?

Where the fuck is Thomas Jefferson. This oh-so-ironic bar chart is crap until it goes back to Jefferson, the Barbary Badass.