Captain Eddie Grimm (Russell Crowe) finds out he and Kinney (Liam Hemsworth) are both from Ohio. He asks Kinney if he's ever been to Mama Santa's on Mayfield. Mama Santa's is a real award winning Italian eatery located in Cleveland, Ohio's Little Italy neighborhood and still operates today. It is considered one of Cleveland's best pizzerias.
Several references are made to "Tier One;" Tier One units, also known as Special Missions Units (SMU), are the most elite of the US military, and includes units such as the army's Delta Force (AKA "1st Special Forces Operational Detachment - Delta"} and the navy's SEAL Team Six (AKA "Naval Special Warfare Development Group" or "DEVGERU"). Much less well known, the US Air Force does also have it's own Tier One Unit/SMU: the 24th Special Tactics squadron (24STS). The 24STS includes specialties such as Pararescue, Combat Controllers, Special Reconnaissance, and Tactical Air Control Party, and are also otherwise trained in ground combat, to include direct action, counter-terrorism, counter-insurgency, hostage rescue, and special reconnaissance, to a level on par with other Tier One Units. Although every service has members trained as JTAC (Joint Terminal Attack Controller), as was Sgt. Kinney, members of the 24STS would normally be the AF members assigned to accompany a unit from Delta or ST6. And, of course, just as there are Green Berets/Special Forces who are not part of Delta, and Navy SEALs who are not part of ST6, there are airmen in each of the listed specialties who are not part of the 24STS.
Liam Hemsworth (Sgt. Kinney) is the real-life brother of Luke Hemsworth (Sgt. Abell). Luke previously appeared together with his brother Chris Hemsworth in Thor: Ragnarok (2017) and Thor: Love and Thunder (2022), so only Liam and Chris have not yet made a movie together.
Russell Crowe has been in movies with all three Hemsworth brothers: Liam Hemsworth in Poker Face (2022), Luke Hemsworth in Thor: Love and Thunder (2022), and Chris Hemsworth in Thor: Love and Thunder.