Watch The Pacific Part 4 Mini Series Stream Online. When your country is at war, you and your family is also in danger, so whats you gonna do with it? A better way is to enlist to be a soldier. Just like Eugene in the new episode of the The Pacific Part 4 Mini Series. In this episode, Eugene Sledge enlists in the Marines and trains for combat, while Leckie and the 1st Marine Division are put into action at Cape Gloucester. The Pacific Part 4 Airs April 4, 2010 (2010-04-04) 9:00 PM in HBO network. Watch The Pacific Part 4 Mini Series Stream Online.