The U.S. will send about 400 troops to train the moderate Syrian opposition, defense officials confirmed Thursday night.

The training is expected to begin in early spring, and the trainers will work out of sites in Saudi Arabia, Turkey and Qatar, said Cmdr. Elissa Smith, a Defense Department spokeswoman.

Smith did not have information on which services would be providing the trainers, but she said the number of trainers could fluctuate based on course load, course requirements and other variables. […]