The mini-series actually filmed at Fort Hood, Texas, in the spring of 2017. Fort Hood is the headquarters for the 1st Cavalry Division. The series filmed at various locations on the installation, including in the Patton Park neighborhood. The Iraqi scenes were also filmed on Fort Hood, on a set built on Elijah Military Operation in Urban Terrain training site. Many of the actual Soldiers portrayed in the mini-series were on site during some of the filming, including now-Lt. Gen. Gary Volesky and now-Gen. Robert "Abe" Abrams. Many of the series extras are Army spouses and children, along with actual Fort Hood soldiers
The pilots used in the MEDEVAC scene were assigned to the actual Dustoff unit used for the mission in 2004. Although the HH-60M helicopter is not period correct, it is a C 2-227 AV aircraft. The medic and crew chief used in the scene are not actors, and were also C 2-227 soldiers.
IP is short for Iraqi Police.
Based on the book by Martha Raddatz who famously cried on air the day Donald Trump was elected president.