In 1962, Burma dictator U Ne Win staged and carried out a coup d'état in Burma, which spurred intermittent protests over his policies for the subsequent decades. By 1988, he had resigned his post of party chairman, essentially leaving the country in the hands of a military junta, but stayed behind the scenes to orchestrate various violent responses to the continuing protests and other events.
Suu Kyi returned to Burma from abroad in 1988, amidst the slaughter of protesters rallying against U Ne Win and his iron-fisted rule. She began speaking out against him, with democracy and human rights at the fore of her struggle. It did not take long for the junta to notice her efforts, and in July of 1989, the military government of Burman—which was renamed the "Union of Myanmar" in 1989—placed Suu Kyi under house arrest and cut off any communication she might have with the outside world.
Though the Union military told Suu Kyi that if she agreed to leave the country, they would free her, she refused to do so, insisting that her struggle would continue until the junta released the country to civilian government and political prisoners were freed. In 1990, a parliamentary election was held, and the party with which Suu Kyi was now affiliated—the National League for Democracy—won more than 80 percent of the parliamentary seats. The election results, though, were predictably ignored by the junta. Twenty years later, they formally annulled the results.
Suu Kyi was released from house arrest in July 1995, and the next year she attended the NLD party congress, under the continual harassment of the military. Three years later, she founded a representative committee and declared it as the country's legitimate ruling body, and in response, in September 2000, the junta once again placed her under house arrest. She was released in May of 2002.
In 2003, the NLD clashed in the streets with pro-government demonstrators, and Suu Kyi was yet again arrested and placed under house arrest. Her sentence was then renewed yearly, and the international community came to her aid each time, calling continually for her release (to no avail).