Since its inception in 2021, it is annually held during the month of May.
[1][2][3] Since of April 2020, due to the COVID-19 pandemic in the United States, Impact had to present the majority of its programming from a behind closed doors set at Skyway Studios in Nashville, Tennessee.
[4] The inaugural Under Siege event took place on May 15, 2021, at the Skyway Studios.
[1] On June 3, 2021, upon Slammiversary, Impact would open the door for attendance for their upcoming shows.
[5] The second Under Siege event was in front of a live crowd, which took place on May 7, 2022, at the Promowest Pavilion at Ovation, in Newport, Kentucky.