Another Look at Our Diplomatic Graph

Digital Humanities, Naval History
I wrote yesterday about my network graph about U.S.-Barbary diplomatic relations. The graph I showed was color-coded by nationality. That code was hand-inputted by me, no computation or algorithm necessary. A perhaps more interesting, and enigmatic, color-coding is the result of running a modularity algorithm in Gephi. This algorithm creates sub-communities from the large network graph. I will not lie: I do not understand the math behind the result. But the communities created by the algorithm are quite interesting. I find a few things interesting about these communities: James Leander Cathcart and Hasan, dey of Algiers, are in two different communities. This is interesting because Cathcart is probably the person with the most access to Hasan in the entire graph. He was an American captive who worked his way up…
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A Graph of Diplomatic Wrangling in Algiers

Digital Humanities, Naval History
When the United States became independent after the American Revolution, it had to struggle to protect its seaborne commerce in the Atlantic and Mediterranean. Americans had to rely on the goodwill of France, Portugal, and other European powers because the United States lacked the naval power necessary to protect its own shipping. Historical Background  Americans had to negotiate with the Barbary states to secure the release of hostages, taken by Barbary corsairs, and to decide how much tribute would guarantee the safety of American shipping. The United States quickly felt the bite of diplomatic and military impotence. American diplomats, who had little power of their own, had to rely on the good graces of many others with better connections to the Algerine court. Sometimes, those others helped the American cause; at other times,…
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Database of Officers of the Line

Digital Humanities, Naval History
Becoming an officer of the line in the navy is a bit like getting on the tenure track in academia. Not all officers are created equal--officers such as pursers, sailing masters, and chaplains were classified as officers and received the preferential treatment given to officers. But they could never be captains--they were not in line for those sorts of promotions. Data The Naval Historical Center has made lists available of the officers of the navy and Marine Corps from 1775 to 1900. This list is very useful, but it's not in a format that makes it easy to see the data in the aggregate. It includes both warrant officers (non-tenure-track) and line officers (tenure-track). I wanted to look at the promotion trends of line officers from the early republic. There…
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