Answer:
Articles of confederation
The answers are economic, Political, and natural disasters
Lyndon Johnson was elected as the youngest minority leader in
Senate. Soon after election the democrats had won majority leader
in the senate. This gained Johnson huge skill which he later
obtained passage of a number of key Eisenhower measures. Later in
the 1960 campaign, Kennedy was Johnson running mate, Kennedy ended
up winning and Johnson made the Vice President. After Kennedy died
Johnson was sworn in as president. In 1964 Johnson won presidency
with over 15,000,000 votes. The republican party was a ruling group
of the time in the nation and though Kennedy wanted to stop civil
rights, he never got time to. So the republicans in the nation all
swarmed to Johnson to a new civil rights bill and tax cuts.
source: white house.gov
If you're referring to the Civil War era, in the years leading up to the war, once such compromise could have been that slavery could continue to exist where it was, but not spread to other states.
The archduke was assassinated in the city of Sarajevo
