Civil War - Captain America (2007)

Collects Captain America (2004) #22-24. Captain America has fallen into a clash with his government and his friends, and the people close to him are paying the price. The life of Cap's girlfriend, Agent 13, is torn apart as her superiors use her divided loyalties against her. Elsewhere, a new villain emerges; the Red Skull begins to make himself known; and the Winter Soldier again comes face-to-face with Cap. But which side will he choose?