I copied a TLDR below, but the entire article is interesting and worth a read

What happened in July was not an invasion. It was the result of a disputed border, a damaged local economy and false rumours about Spanish policy. Dozens of people drowned in the gap between those facts and the word used to describe them.

Also, if you only heard a part of the story, here is more context

That day, tens of thousands of people arrived by sea and land from Morocco into Ceuta. Spain estimated 50,000 arrivals, Ceuta’s regional government 60,000 and Morocco 40,000. Spain said at least 72 people died, most from drowning. Morocco reported 11 deaths, while the Moroccan Association for Human Rights said nearly 130 died.

United States President Donald Trump called the crossings an “invasion.” Online commentators, meanwhile, theorized that the U.S. and Israel had encouraged Morocco to punish the Spanish leader, whose government has become one of Israel’s harshest critics in Europe.

An Associated Press fact check found no evidence for the claim.

Most of those who crossed quickly went back. Within a few hours, Spain said 48,300 people had returned to Morocco, and most of the rest followed within days. The EU migration commissioner, Magnus Brunner, said none had reached mainland Europe.