Which of these events happened first? operation rolling thunder tet offensive escalation of us troops in vietnam gulf of tonkin resolution

The correct answer is "The Gulf of Tonkin Resolution".

The Gulf of Tonkin Resolution was enacted on August 10, 1964. It was the initial action that the US government took regarding the Vietnam War. After the "Gulf of Tonkin Incident", which saw the USS Maddox engage into combat with 3 North Vietnamese torpedo boats on August 2, 1964, President Lyndon Johnson was granted the authorization by US Congress to formally declare war on North Vietnam.  

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".