Question: Which 18th President of the United States was present at the Battle of Young's Point?

Context paragraphs:
James Buchanan: James Buchanan Jr. ( ; April 23, 1791June 1, 1868) was the 15th President of the United States (1857–61), serving immediately prior to the American Civil War.  He is the only president from Pennsylvania, the only president to remain a lifelong bachelor, and the last president born in the 18th century.  A member of the Democratic Party, he was the 17th United States Secretary of State and served in the United States Senate and United States House of Representatives.

Battle of Young's Point: The Battle of Young's Point was an engagement in the American Civil War that took place in Madison Parish, Louisiana, on June 7, 1863.  It had an observable influence on the direction and conduct of the Vicksburg Campaign.  The inability of the Confederates to destroy the vital Union supply depot at Young's Point and thus force Maj. Gen. Ulysses S. Grant to loosen his grip on Vicksburg contributed to the ultimate surrender of the city on July 4.

Cleto González Víquez: Cleto de Jesús González Víquez was, on two occasions, the President of Costa Rica, firstly as the 18th president in 1906 and lastly as the 26th president in 1928.  "Don Cleto" was born in Barva, Heredia on October 13, 1858 as the son of Cleto González Pérez and Aurora Víquez Murillo.  He was a renowned Costa Rican politician, lawyer, and historian.

1872 Democratic National Convention: The 1872 Democratic National Convention was a presidential nominating convention held at Ford's Grand Opera House on East Fayette Street, (between North Howard and North Eutaw Streets) in Baltimore, Maryland on July 9 to 10, 1872.  It resulted in the nomination of newspaper publisher Horace Greeley, (1811-1872), of New York and Governor Benjamin Gratz Brown, (1826-1885), of Missouri for President and Vice President, a ticket previously nominated by the rump Liberal Republican faction convention meeting also in Baltimore's newly built premier Opera House of nationally well-known theatre owner/operator John T. Ford, (1829-1894), (infamous as the owner of the Ford's Theatre in Washington, D.C. where 16th President Abraham Lincoln had been assassinated in April 1865) of the major Republican Party which had already re-nominated incumbent 18th President Ulysses S. Grant, (1822-1885), of the regular Republicans for another term.

Norberto Ramírez: Norberto Ramírez Áreas (late 18th century, León, Nicaragua — 11 July 1856, León, Nicaragua) was a Nicaraguan lawyer and politician.  From 20/23 September 1840 to 7 January 1841 he was the 13th President (called Chief) of El Salvador, still technically a state in the Federal Republic of Central America.  From 1 April 1849 to 1 April 1851 he was the 24th President (then called Supreme Director) of independent Nicaragua.

Roger Taylor (college president): Roger Taylor was the 18th president of Knox College, a nationally ranked liberal arts college located in Galesburg, Illinois.  A native of Fulton County, Illinois, Taylor is a 1959 graduate of Cuba High School.  He received his bachelor's degree in English from Knox College in 1963, and then served in the United States Navy for three and one-half years, including a year in Vietnam, before entering law Northwestern University School of Law in 1968.  He graduated with honors from Northwestern in 1971 and served as an editor of the law review.  After law school, he practiced law at the firm of Kirkland & Ellis in Chicago, ultimately becoming partner with the international firm.  Taylor joined the Knox College Board of Trustees in 1998 and served as its chair from 1999-2001.  He became interim president in 2001, after the departure of Knox’s 17th president, Richard Millman, and was officially installed as president of Knox College in October 2002.  He served in that role until retiring in 2011.

Adolfo Díaz: Adolfo Díaz Recinos (15 July 1875 Alajuela, Costa Rica – 29 January 1964, San José, Costa Rica) was the 12th President of Nicaragua between 9 May 1911 and 1 January 1917 and 18th between 14 November 1926 and 1 January 1929.  Born in Costa Rica to Nicaraguan parents in 1875, he worked as a secretary for the La Luz y Los Angeles Mining Company, an American company chartered in Delaware that owned the large gold mines around Siuna in eastern Nicaragua.  In this capacity, he helped channel funds to the revolt against Liberal President José Santos Zelaya, who had incurred the anger of the United States by negotiating with Germany and Japan to resurrect the proposed Nicaragua Canal.  Díaz became Vice President of Nicaragua in 1910.  After he became president in 1911, Díaz was forced to rely on U.S. Marines to put down a Liberal revolt, which resulted in a contingent of Marines remaining in Nicaragua for over a decade.  In return, in 1914, he signed the Bryan-Chamorro Treaty, which granted the United States exclusive rights to build an inter-oceanic canal across Nicaragua.

Ulysses S. Grant: Ulysses S. Grant, born Hiram Ulysses Grant , (April 27, 1822 – July 23, 1885) was the Commanding General of the United States Army at the end of the American Civil War and later the 18th President of the United States from 1869 to 1877.  As Commanding General, Grant worked closely with President Abraham Lincoln to lead the Union Army to victory over the Confederacy in the Civil War.  Supported by Congress, Grant implemented Reconstruction, often at odds with President Andrew Johnson.  Twice elected president, Grant led the Republicans in their effort to remove the vestiges of Confederate nationalism and slavery, protect African-American citizenship, and support economic prosperity.  Although his presidency has often been criticized for multiple administration scandals and for his failure to alleviate the economic depression following the Panic of 1873, he is regarded as a President who performed relatively well in the context of his time and pursued justice for all.

John F. Kennedy presidential campaign, 1960: The 1960 presidential campaign of John F. Kennedy, a United States Senator from Massachusetts, began on January 2, 1960, when Kennedy formally announced his candidacy for 35th President of the United States, replacing incumbent President of the United States Dwight D. Eisenhower.  Kennedy was nominated by the Democratic Party at the Democratic National Convention of 1960, taking place between July 11 and July 15, 1960.  On July 15, 1960, Kennedy named Senator Lyndon B. Johnson of Texas as his official running mate.  Kennedy and Johnson won the election on November 8, 1960, defeating incumbent Vice President and Republican nominee Richard Nixon, who would later go on to be the 37th President of the United States.  Kennedy and Johnson were sworn in as 35th President and 37th Vice President of the United States on January 20, 1961 respectively.  Kennedy would serve as President of the United States until his death in November 1963.

Aloysius Masnata: Aloysius Masnata, (S.J.) (May 2, 1823 – November 18, 1886) was the 5th president of Santa Clara University, California, United States.  He was a Genoese priest.  At the age of seventeen he was admitted into the novitiate of the Society of Jesus.  After studying philosophy and rhetoric and teaching for a year, he was sent to Vals, France, for the study of theology.  After his study in France, he immigrated to the United States with other Jesuits after ordination and completed his fourth year of theology at Georgetown College along with Rev. Salvator Canio and Rev. Joseph Bixio.  After his study he spent four years teaching rhetoric at Frederick, Maryland, where he was minister and socius to the master of novices.  In 1854 Masnata S.J. sailed to California through Panama and arrived in San Francisco, United States, along with Fr.  Charles Messea S.J. and Fr.  Anthony Maraschi S.J.  In 1865 he was appointed Santa Clara University's fifth president successor of the presidency of Burchard Villiger.  In 1868, shy and lacking in proper English, Masnata was replaced by Aloysius Varsi.  In 1873 Fr.  Aloysius Masnata, S.J. served as the 6th president of San Francisco's St. Ignatius College.  On November 18, 1886, Aloysius Masnata died in Los Gatos, California.

Supporting paragraphs: Battle of Young's Point Ulysses S. Grant
Answer: Ulysses S. Grant