Hundreds of Pennsylvania National Guard soldiers have been arriving this week for training at a south Mississippi base.

Nearly 4,000 members of the 56th Stryker Brigade, 28th Infantry Division, are expected to train at Camp Shelby near Hattiesburg for eventual deployment to Iraq.

The 56th is the only Guard unit in the country that is a Stryker brigade.

Lt. Col. Doril Sanders, a Camp Shelby spokesman, says the brigade will train there for about 45 days before heading to Fort Polk, La., for more preparation.

More than 60,000 Guard soldiers from across the country have trained at Camp Shelby, since it was federally mobilized in 2004.

This will be the first Stryker brigade to train there.