KAMPALA, Uganda -- An advocacy group says the hunt for the African warlord Joseph Kony is hopeless without more troops and urges American forces to "play a more operational role" on the ground.

The U.S.-based Enough Project said in a report released Friday that the fight against the Lord's Resistance Army is not going well partly because Ugandan soldiers in central Africa face multiple logistical and intelligence challenges that limit their ability to locate the rebels.

President Barack Obama roughly a year ago sent 100 U.S. Special Forces troops to help regional governments eliminate Kony, an accused war criminal, and other LRA commanders, but they only play an advisory role.

About 2,500 African Union troops led by Uganda are involved in the manhunt.