LOOKING BACK

1919: pianist and statesman Ignacy Jan Paderewski became the first premier of the newly created Republic of Poland.

1920: Prohibition began in the United States as the 18th Amendment to the U.S. Constitution took effect, one year to the day after its ratification.

2006: Africa’s first elected female head of state, Ellen Johnson Sirleaf, was sworn in as Liberia’s new president.