- 1851–52 • Chile
Apostle Parley P. Pratt and his wife Phoebe served a five-month mission to Chile. During their time in Chile, they determined that a Spanish translation of the Book of Mormon was needed.
- 1886 • Salt Lake City, Utah
The Spanish translation of the Book of Mormon was published.
- 1923–25 • Buenos Aires, Argentina
The Friedrichs and Hoppe families, converts from Germany, moved to Buenos Aires and began holding meetings in their homes and inviting their neighbors. They wrote to Church leaders urging them to send missionaries to Argentina.
- December 25, 1925 • Buenos Aires
Elder Melvin J. Ballard of the Quorum of the Twelve Apostles dedicated all of South America for the preaching of the gospel.
- June 15, 1926 • Argentina
Eladia Cifuentes, the first Spanish-speaking convert, was baptized.
- July 15, 1926 • Argentina
Reinhold Stoof was made president of the newly established South American Mission.
- July 28, 1931 • Buenos Aires
Luigi and Mariantonia Notaro donated their property on Tonelero Street in the Liniers neighborhood for the construction of the first meetinghouse in Argentina.
- February 14, 1934 • Buenos Aires
The Relief Society was organized in the Argentine Mission with Carmen de Escudero as president.
- September 30, 1935 • Buenos Aires
The first Primary in Argentina was organized in the Liniers Branch with Angela Mericia de Peyrera as president.
- January 9, 1937 • Argentina
El mensajero (the Messenger), a Spanish-language periodical of the Argentine Mission, was first published.
- 1938 • Córdoba, Argentina
The Bony and Oguey families, Swiss immigrants, brought the Church to the Córdoba area.
- 1939–42 • Argentina
The government of Argentina dramatically reduced visas issued to missionaries from the United States.
- April 19, 1939 • Bahía Blanca, Argentina
Luís Costantini was called as a missionary in Bahía Blanca. He was the first of many members who were called to preach in their local areas.
- 1942–45 • Argentina
Mission president James L. Barker and his wife, Kate, remained to oversee the Church in Argentina, and local leaders were called to lead their branches.
- October 14, 1943 • Buenos Aires
Ursula Bond, a member of the Liniers Branch, made the first donation to the future construction of a temple in Argentina decades before a temple was announced.
- 1944 • Argentina
Cecile S. Young, Relief Society president for the Argentine Mission, organized the Relief Society throughout the country.
- January 6–9, 1944 • Buenos Aires
The first youth conference in Argentina was held.
- January 1946 • Argentina
Lyman and Afton Shreeve and their children became the first North American missionaries sent to Argentina following World War II. More soon followed.
- January–February 1952 • Argentina
Local brethren were called to preside over most districts and all branches throughout the country.
- February 3, 1954 • Buenos Aires
President David O. McKay visited members in Argentina, authorized the construction of meetinghouses throughout the country, and met with Juan Perón, president of Argentina.
- April 1955 • Salt Lake City
The Liahona, the Church’s international publication, was published in Spanish. El mensajero was discontinued.
- 1960–65 • Argentina
A phased meetinghouse construction program allowed 20 new meetinghouses to be built in Argentina by 1965, with an additional 78 planned.
- May 1963 • Salt Lake City
A special issue of the Improvement Era highlighting the progress of the Church in South America featured an article on the Argentine Mission.
- November 20, 1966 • Buenos Aires
The Buenos Aires Argentina Stake, the first Spanish-speaking stake in South America, was organized, with Ángel Abrea as stake president.
- July 1969 • Argentina
The stake Young Men presidency of the Buenos Aires Argentina Stake began organizing seminary and institute classes throughout the country.
- March 7–9, 1975 • Buenos Aires
President Spencer W. Kimball presided at an area conference for members living in Argentina, Chile, Paraguay, and Uruguay.
- October 30, 1978 • São Paulo, Brazil
Following the dedication of the São Paulo Brazil Temple, Saints in Argentina began organizing bus trips to attend the temple.
- November 23, 1980 • La Plata, Argentina
The 20th stake in Argentina was organized in La Plata.
- April 4, 1981 • Argentina
Ángel Abrea was called to the First Quorum of the Seventy, the first General Authority from South America.
- March 5, 1994 • Buenos Aires
A missionary training center was dedicated on the grounds of the Buenos Aires Argentina Temple.
- February 25, 1996 • Bariloche, Argentina
The Bariloche Argentina Stake, the 50th in Argentina, was organized.
- November 11, 1996 • Buenos Aires
President Gordon B. Hinckley spoke to a gathering of nearly 50,000 Latter-day Saints at the Estadio de Velez Sarsfield soccer stadium in Buenos Aires.
- 1998 • South America South Area
Saints throughout Argentina, Chile, Uruguay, and Paraguay participated in a joint day of service, marking the beginning of the Church’s Mormon Helping Hands program.
- June 2000 • South America
Saints throughout South America celebrated the 75th anniversary of the Church on the continent.
- February 21, 2014 • Buenos Aires
Elder M. Russell Ballard of the Quorum of the Twelve Apostles returned to the park where his grandfather dedicated South America, and he offered a prayer of dedication specifically for Argentina.
- April 1, 2017 • Salt Lake City
Cristina B. Franco, a native of Buenos Aires, was called as the Second Counselor in the Primary General Presidency.
- April 1, 2018 • Salt Lake City
President Russell M. Nelson announced the construction of a temple in Salta.