In the United States presidential line of succession, it falls to the Vice President to succeed to the presidency if their predecessor is no longer able to carry out the duties of the office. This has happened nine times in the history of the country, under a wide variety of circumstances. Some Vice Presidents, such as Calvin Coolidge, succeeded to the top spot during a time of relative peace and economic prosperity. Others, such as Harry Truman, were appointed to the office in a climate of war and political turmoil. Vice Presidents only inherit the presidency under unusual circumstances, and each instance is unique. Here are nine facts about the U.S. Vice Presidents who have succeeded to the presidency.

John Tyler Was Nicknamed “His Accidency”

John Tyler was elected Vice President in 1840 as the running mate of William Henry Harrison. Unfortunately, Harrison’s administration did not last long: The President died in 1841 just 31 days after taking office, which meant Tyler quickly found himself the nation’s commander in chief. Tyler’s presidency was marked by tension with his own Whig Party. He vetoed bills proposed by Whig leaders in Congress and began to advocate for policies that broke with the Whig Party line. As a result, the Whigs expelled President Tyler from their party, and some even called for his impeachment on the grounds that he had abused his veto power. To further disparage Tyler, his political critics saddled him with the nickname “His Accidency,” a pejorative reference to the fact that he had become President through chance, and was never elected to the office.

Millard Fillmore was the last president to be neither a Democrat nor Republican

When Vice President Millard Fillmore ascended to the presidency in 1850, after his predecessor Zachary Taylor died following a mysterious illness, he did so as a member of the Whig Party, which was founded in 1830 to oppose the policies of then-President Andrew Jackson, a Democrat. President Fillmore proved to be the last Whig Party member to become President of the United States. The party largely disbanded a year after his administration ended in 1853, with many of its anti-slavery members branching off to form the Republican Party. In fact, Fillmore was the last U.S. President to belong to neither of the two major parties that continue to dominate American politics today. Fillmore’s successor, Franklin Pierce, was a Democrat, and every U.S. President since has been either a Democrat or a Republican.

Andrew Johnson was the first president to be impeached

Andrew Johnson became President in 1865, during one of the most turbulent moments in American history. The Civil War had just ended, and the nation was still reeling from that violent conflict and the assassination of Abraham Lincoln. When Vice President Johnson took office following Lincoln’s death, his principal task was the reconstruction of the former Confederate states. President Johnson, a Democrat from Tennessee, was criticized by Republicans in Congress for being too lenient with former members of the Confederacy, and for vetoing legislation designed to protect the rights of newly freed Black Americans. 

The escalating tensions between Johnson and the congressional Republicans reached a crisis point in 1868, when the President fired Edwin Stanton, his Republican secretary of war, without the required congressional approval. In response, the House of Representatives voted to impeach Johnson, marking the first time in U.S. history such an action had been taken against the President. Johnson narrowly escaped conviction by just one vote, but by the end of his first term, he found himself with few political allies in Washington, and was not elected to a second term.

Chester A. Arthur earned the approval of Mark Twain

Chester A. Arthur succeeded to the presidency following the death of President James Garfield in 1881. During Arthur’s one term in office, he advocated lower tariffs for businesses and tax cuts for American citizens. President Arthur also passed the Pendleton Civil Service Reform Act, which made some federal government jobs attainable only through merit-based examinations instead of through the “spoils system.” The “spoils system” allowed politicians to hire and fire civil servants based on their loyalty and political affiliations, and had frequently been denounced as a tool of political corruption. Through policies like these, Arthur managed to earn the praise of one of the sharpest and most unsparing satirists of his day, Mark Twain. Though Twain was noted for his pointed criticisms of many politicians, he claimed that it would be “hard to better President Arthur’s administration” — glowing praise indeed from a writer who once calledPresident Teddy Roosevelt “the most formidable disaster that has befallen the country since the Civil War.”

Theodore Roosevelt was the first president to win the Nobel Peace Prize

Theodore Roosevelt was Vice President to William McKinley until President McKinley’s death in 1901. During his time in the White House, President Roosevelt became many things: a conservationist, a trust buster, and, in 1906, a Nobel Prize-winning peace negotiator. From 1904 to 1905, Japan and Russia were locked in the Russo-Japanese War over conflicting imperial ambitions in Manchuria and Korea. The war threatened to destabilize Asia and disrupt the balance of power in the Pacific, so Roosevelt decided to intervene to de-escalate the conflict. In August 1905, Roosevelt invited delegates from Japan and Russia to convene in Portsmouth, New Hampshire, for peace negotiations. The President presided over the peace talks for 30 days before the two warring countries ended the conflict by signing the Treaty of Portsmouth. For his role in brokering the peace, Roosevelt was awardedthe 1906 Nobel Peace Prize, making him the first U.S. President to receive the honor.

Calvin Coolidge was administered the oath of office by his father

After serving as Vice President from 1921 to 1923, Calvin Coolidge became President of the United States after Warren G. Harding passed away following a sudden illness. Coolidge was at his family home in Vermont when he learned that Harding had died and he needed to take the oath of office. While the oath is typically administered by the chief justice of the United States, Coolidge wound up going for someone less formal: his own father. As a notary public, Coolidge’s father, John Calvin Coolidge Sr., had the legal power to administer the oath. The modest inauguration ceremony was attended by just a handful of people, and since it was the middle of the night and the house had no electricity, the new President took his late-night oath by the flame of a kerosene lamp.

Harry S. Truman’s inauguration was the first to be televised

Harry S. Truman had been Vice President for just 82 days when Franklin D. Roosevelt passed away in 1945. After completing his first presidential term, during which he oversaw the end of World War II, Truman ran for a second term (the first to which he would need to be elected) in 1948. In a famous upset, the incumbent President beat his Republican challenger Thomas E. Dewey. When it came time for Truman to take the oath of office, the event was a far cry from Calvin Coolidge’s candlelit affair. The inauguration ceremony was the first in history to be broadcast on television, and was watched by some 10 million viewers. 

Lyndon B. Johnson was elected by the widest ever margin at the time Her

Lyndon B. Johnson’s first presidential term began in 1963 under tragic circumstances following the death of President John F. Kennedy. During his time in office, Johnson laid out his “Great Society” platform, which included new social policies such as Medicare and numerous laws designed to alleviate poverty. In 1964, when it was time for Johnson to seek election to a second term, it quickly became clear that his first term had made a good impression. Johnson won the presidential race against Republican challenger Barry Goldwater by 15 million votes, the widest margin of any U.S. presidential election at the time. (Richard Nixon later won the 1972 election by nearly 18 million votes, and Ronald Reagan won reelection in 1984 by around 16.8 million votes.) 

Gerald Ford succeeded a resigning vice president and a resigning president

Though Gerald Ford served as President Richard Nixon’s Vice President from 1973 to 1974, he was never Nixon’s running mate. Ford was a leading Republican congressman when, in 1973, Vice President Spiro Agnew resigned amid a corruption scandal. To fill the vacancy left by Agnew’s resignation, President Nixon appointed Ford as his new VP. Ford’s tenure as Agnew’s replacement didn’t last long, however, because just one year later he became Nixon’sreplacement. Following the events of the Watergate scandal, Nixon resigned the presidency in 1974, leaving Ford to take his place in the Oval Office. To this day, Ford remains the only person to serve as U.S. President without winning a general election as either a presidential or vice presidential candidate.