With its predecessor Band of Brothers being praised for its authentic look at World War II, many fans wonder how accurate is The Pacific, especially in regards to the story of John Basilone (John Seda). First premiering on March 14, 2010, The Pacific acts as a rousing companion piece to HBO's Band of Brothers, instead focusing on the United States Marine Corps's actions in the Pacific Theater of Operations within the wider Pacific War of World War II. Understandably, the question of how accurate is The Pacific comes up, but the show does involve real people, places, and events, including the incredible true story of Gunnery Sergeant John Basilone.

https://screenrant.com/pacific-john-basilone-true-story-what-happened/