procession
US /prəˈseʃ.ən/
UK /prəˈseʃ.ən/

1.
2.
a series of people or things moving along in an orderly and continuous way
:
•
A procession of cars left the parking lot.
•
The speaker was followed by a procession of questions.
a series of people or things moving along in an orderly and continuous way