Here's a short story:

The Republic of Liberia, beginning as a settlement of the American Colonization Society (ACS), declared its independence on July 26, 1847. The United States did not recognize Liberia's independence until during the American Civil War on February 5, 1862. Between January 7, 1822 and the American Civil War, more than 15,000 freed and free-born Black Americans from United States and 3,198 Afro-Caribbeans relocated to the settlement. The Black American settlers carried their culture with them to Liberia. The Liberian constitution and flag were modeled after the United States. In January 3, 1848 Joseph Jenkins Roberts, a wealthy free-born Black American from Virginia who settled in Liberia, was elected as Liberia's first president after the people proclaimed independence. 

Longstanding political tensions from the 27 year rule of William Tubman resulted in a military coup in 1980 that overthrew the leadership soon after his death, marking the beginning of political instability. Five years of military rule by the People's Redemption Council and five years of civilian rule by the National Democratic Party of Liberia were followed by the First and Second Liberian Civil Wars. These resulted in the deaths and displacement of more than half a million people and devastated Liberia's economy. A peace agreement in 2003 led to democratic elections in 2005. Recovery proceeds but about 85% of the population live below the international poverty line. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: Who was in charge during a long period of stress?
Guess: William Tubman

Question: What kind of stress was it?
Guess: political

Question: How long was he in charge?
Guess: 27 years

Question: What happened after he died?
Guess: a military coup

Question: When was this?
Guess: in 1980

Question: Was the rebellion successful?
Guess: Yes

Question: Did it stabilize the region?
Guess: No

Question: Where was all this?
Guess: The Republic of Liberia

Question: Did it start out independent?
Guess: No

Question: What was it a part of?
Guess: the American Colonization Society

Question: Did it ever become independent?
Guess: Yes

Now answer the following question in the same format.

Question: When?

on July 26, 1847