MANILA, Philippines — A U.S. Marine was convicted today of raping a Filipino woman and sentenced to 40 years in prison, ending an emotional trial that has strained U.S.-Philippine ties and tested a joint military pact.

Three other Marines and their Filipino driver were acquitted of complicity.

Lance Cpl. Daniel Smith, 21, from St. Louis, was the first American soldier convicted of wrongdoing in the Philippines since the country shut down U.S. bases here in the early 1990s. His lawyer, Ricardo Diaz, said he would appeal.

Staff Sgt. Chad Carpentier, Lance Cpl. Keith Silkwood and Lance Cpl. Dominic Duplantis, who had been accused of cheering Smith on, were freed.

Smith, who was in the country for joint training, did not deny having sex with the 23-year-old woman but testified that it was consensual.

The court said the woman, known publicly by her pseudonym "Nicole," was so intoxicated that she could not have consented to sex.

A court employee read the decision live on national television.

Judge Benjamin Pozon of the Makati Regional Trial Court said in English that the severe penalty was aimed "to protect women against the unbridled bestiality of persons who cannot control their libidinous proclivity."

About 100 protesters had gathered outside the courthouse, demanding the government scrap the 1998 Visiting Forces Agreement that allows U.S troops to train with Philippine troops after the Philippine Senate ordered U.S. bases shut down in the early 1990s.