Gameplay in the video shows a bombed-out Los Angeles, urban combat through city streets and ... horseback chases through the desert.

CNN: 'Black Ops 2' trailer hints at series' dark future

They're trained in urban combat, intelligence techniques, foreign languages and foreign cultures.

NPR: Military Works to Retain In-Demand Special Forces

Though Homs has been the site of urban combat for two years, the soldiers -- from the front line to checkpoints -- appeared largely combat-ready.

CNN: Syrian army in Homs is showing strains of war

This is the first pilgrimage to take place since U.S. combat forces completed their withdrawal from Iraqi cities and urban areas on June 30.

CNN: Three U.S. soldiers killed in Iraq