PARIS?President Jacques Chirac pledged Sunday that French troops will participate in the U.S.-led military offensive against Afghanistan, the first time the French leader has made an offer of such direct support.

?Our forces will participate,? Chirac told the nation in a televised address. He said that the United States had made new requests for French military participation in recent days.

?The fight against terrorism is complex and without mercy,? Chirac said, adding that ?the military operations will take place over a long period.?

President Bush informed Chirac by telephone an hour ahead of the strikes that a U.S. offensive on Afghanistan was ?imminent,? French presidential spokeswoman Catherine Colonna said.

Chirac said ?at this stage,? French vessels are associated with the operation, but he did not give details.