a massed group of people or things
phalanx - group
The formal word ‘phalanx’ originally referred to a body of troops standing in close formation for the purposes of defence or attack. From that sense, it has come to mean a large group of people or things standing or moving together for a particular purpose.
The business mogul entered court on the first day of his trial surrounded by a phalanx of lawyers.
A phalanx of police officers blocked the road to stop the protestors from marching on the government building.
The movie star faced a phalanx of photographers as she attended the premiere of her latest blockbuster.