Original sentence: After the 9/11 attacks in the USA, Triumph, along with her sister-ship Trafalgar, formed part of a task group in 2001 as part of the American-led invasion of Afghanistan, Britain's contribution being known as Operation Veritas
Edited sentence: After the  9/11  terror attacks in the USA, Triumph, along with her sister-ship Trafalgar, formed part of a 2001 task group and a vital element of the USA response and part of the American-led invasion of Afghanistan, Britain's contribution being known as Operation Veritas