Late Mar. 29, two Sikorsky HH-60 Black Hawk helicopters were flying a "routine training mission" 25 miles NW of Ft. Campbell, KY when the two helicopters collided mid-air around 10pm. An eyewitness recalls stating "wow, those [helicopters] look really close tonight for whatever reason.." and then says he saw an explosion. An Army official confirmed that all 9 aboard the two rotorcraft were killed. The two helicopters belonged to the 101st Airborne Division.

Photo source: https://www.cnbc.com/2023/03/30/2-army-blackhawk-helicopters-crash-during-training-in-kentucky.html

Article sources: https://www.armytimes.com/news/your-army/2023/03/30/two-black-hawks-crash-near-fort-campbell-casualties-unclear/, https://abcnews.go.com/US/2-army-blackhawk-helicopters-crash-kentucky/story?id=98225427