Liwa Tahr al-Muhandis () was a militant organization in Iraq.
It was founded on May 21, 2020, that same day it attacked the Baghdad Airport with Katyusha rockets. On May 23, 2020 shot down a Boeing CH-47 Chinook with a rocket launcher On April 17, 2021, attacked some Boeing CH-47 Chinook in Baghdad with two Rockets. On July 7, 2021 twelve rockets were fired at the Al-Asad Airbase On August 21, 2022 attacked a convoy in the Saladin Governorate On June 15, 2023, it claimed the murder of an american soldier in 2017, which contradicted its founding in 2020.