After two decades, the U.S. military occupation of Afghanistan came to an end, with the Taliban retaking control of the country, the civilian government falling and thousands attempting to flee.

The chaotic scenes at the Kabul airport in August were shown around the world. Afghan forces put up little resistance.

The Taliban seized power in a rapid takeover of the civilian government that took just a few days. Some analysts described what happened as a massive "intelligence failure."

Here’s a timeline of Afghanistan in 2021.

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