GAZA CITY — “My Homeland” was once a triumphant military song, played with drums and trumpets, long the anthem of Palestinians. It has since transformed into a lament of a tumultuous region.

In Gaza on Saturday, Palestinians gathered to sing it in communities across the territory as part of a social media campaign organized through a Facebook page as a “call for solidarity with the struggle of the Palestinian people for their freedom and rights.”

The campaign urged Palestinians in the West Bank, East Jerusalem and Gaza to take part in similar performances, and it also reached out to Palestinians living in the West, including in Norway and Washington.

But even as the campaign sought to cast a wide net and reach a broad audience, the Palestinians in Gaza seemed to be singing mainly to one another, an act less about political solidarity than about the comfort of reassuring voices during a time of turmoil.