A total of 51 NATO and partner nations deployed troops to Afghanistan following the September 11, 2001 terrorist attacks after NATO activated Article 5 for the only time in its history.

From the articlePete Hegseth’s Afghanistan war comments spark backlash from veteransAlso in Hegseth’s Afghanistan remarks spark backlash from US veterans, allies, No 10 hits back after Trump’s war secretary diminishes UK’s role in Afghanistan, Hegseth ‘wrong’ to diminish NATO role in Afghanistan: UK prime minister’s office, No10 rebukes Hegseth for mocking role of Nato troops in Afghanistan