The Receiving End of Sirens (abbreviated TREOS) was an American rock band from Belchertown, Massachusetts, United States.

About a week before the start of the tour, guitarist and vocalist Alex Bars fell down a flight of stairs, breaking his scapula and two ribs and puncturing a lung; a question of whether or not he would be able to perform arose, yet he pulled through.

Some of the bands who supported TREOS on their first headlining tour were As Tall as Lions, A Thorn for Every Heart, Hit the Lights, and I Am the Avalanche.

The main reason for the breakup was the fact that Brendan Brown had a child in January 2008, and he decided he needed to reassess his priorities.

The band played two of their last three last shows at Lupo's in Providence, Rhode Island, on May 2, supported by Envy on the Coast and Therefore I Am, and at The Bamboozle Festival in East Rutherford, New Jersey on May 4.

After a year of touring, Casey Crescenzo left the band in May 2006 and started pursuing his side project, The Dear Hunter, full-time.

After Crescenzo's departure, a long-time friend of the band Ross filled in on guitar during their tour with Circa Survive and most notably at radio station WFNX's "Disorientation" free concert in Boston featuring TREOS and Taking Back Sunday.

On November 6, 2006, TREOS announced former Boys Night Out drummer Brian Southall was joining the band, playing guitar, keys, and backup vocals.

The band had arranged to stream a live concert from Vintage Vinyl Record Store in New Jersey on the new real-time entertainment site www.Yebotv.com on August 9, 2007.

Former singer Casey Crescenzo made a return halfway through the set; TREOS performed virtually all of their tracks, forcing them to repeat "Planning a Prison Break" as their encore.

On June 6, 2009, the first news pointing towards a closer release date was found at Absolute Punk, where TREOS asked for fans to send in pictures of them with the band.

After the breakup of The Receiving End of Sirens, Brian Southall began working on a new project titled The Company We Keep.

[6] The Skate Fest web page was updated with a previously unreleased video of "The War of All Against All" from the farewell show in Providence.

Triple Crown Records later confirmed that they would be re-releasing Between the Heart and the Synapse as a double LP, along with a new song by the band and live videos.

[12] On February 17, 2020, the band's official Twitter page announced a tour with Envy on the Coast;[13] it was later called off due to the COVID-19 pandemic.