20th Century Fox has debuted a preview teasing the second trailer for Dawn of the Planet of the Apes, which hits one week from today, Thursday, May 8. This latest footage features Caesar (Andy Serkis) and his ape army on horseback, as the gates to their compound are swung open for an attack! We also catch a brief glimpse of Jason Clarke, who may be humanity's only savior in director Matt Reeves follow-up to Rise of the Planet of the Apes, debuting in theaters July 11. Take a look at this sneak peek, then check back in one week for the full trailer.