By Al Jazeera, Oct. 6, 2017
The United Nations peacekeeping mission in Haiti lowered its blue flag on Thursday, 13 years after it began.
While the mission has been credited with helping bring stability to the poorest country in the Western Hemisphere, it has also been mired in controversy.
The mission is blamed for bringing cholera to the country, and at least 134 of its peacekeepers have been involved in sexual abuse scandals.
As the last of the thousands of peacekeepers who were in the country leave, Al Jazeera answers some of the key questions about why the blue helmets were there and what they are leaving behind.
What will be their legacy?
The presence of UN troops in Haiti has been a point of controversy on the island since the UN Stabilization Mission in Haiti (MINUSTAH) mission first began in 2004.
UN officials have praised the mission for helping to re-establish law-and-order in the country marred by political unrest and bolster Haiti's democratic institutions. MINUSTAH has also helped recruit and train a new civilian police force, something that was virtually nonexistent before their arrival.
However, critics argue the mission's forces have done more harm than good, pointing to the peacekeepers' involvement in the country's 2010 cholera outbreak and sex abuse scandals as evidence.
The source of the waterborne disease, which killed more than 9,000 people, was traced to a UN base.
Al Jazeera's Fault Lines investigated the outbreak in 2010. The film - Haiti in a Time of Cholera - helped further expose the source of the disease on the island, and put additional pressure on the UN to investigate the allegations, and eventually admit its role in the outbreak.
In August 2016, the…