I thought I knew the meaning of this word, but after looking it up in the dictionary I got pretty much confused

All I came across was the following definition:
'A division of soldiers trained to parachute from aircraft into enemy territory or a battle zone.'
I was wondering if there was any other meaning of this word, since the one mentioned above doesn't seem to make much sense in the sentence:
'One of the most brutal incidents between these two sides happened in 1972. It was the famous 'Bloody Sunday', when 13 unarmed demonstrators were shot dead by the British
paratroops in Londonderry.'
Am I too much of a philosopher?
