The Palladian Traveler meanders around the town that George Washington envisioned, stopping long enough to smell the cherry blossoms, soak in the history, marvel at the art and architecture and inhale the aromas of epicurean delights as he files his latest dispatch from the US capital.

The “shot heard round the world” that started World War I was fired on June 28, 1914, when a student shot the archduke Franz Ferdinand of Austria in Sarajevo, beginning a conflict that lasted four years, involved 32 countries and cost 41 million military and civilian casualties, including 18 million lives. By 1917, the war was not going well for …