Admiral John McCain, Sen. McCain's Grandfather-- Part 1: World War I Service and Interwar

From the United States World War I Centennial Commission  "Remembering the World War I service of John "Slew" McCain" by Chris Isleib.

A few weeks ago, our country lost one of our greatest heroes, Senator John McCain.  He was in the U.S. Navy and his father and grandfather were both admirals in the Navy and both fought in World War II.  All three men were named John McCain with the senator being the III.

This is his grandfather's role in World War I and the interwar:

After his service in World War I, which was primarily convoy duty in the Atlantic Ocean aboard the USS San Diego (which was sunk by a mine placed by a U-boat off Long Island, New York two months after he transferred off it) he advanced in rank and became an expert in the budding field of Naval Aviation.

These skills would prove critical to American efforts when World War began.

--GreGen