These raids were begun under the George W Bush administration, terminated under Obama, and (one instance) brought back under Trump.  Trump is planning mass arrests if he becomes president in 2025.

April, 2006. Several factories of IFCO, a manufacturer of crates and pallet facilities, we raided with arrests of about 1,100 workers and some management staff.

December 2006: Swift meat processing plants are raided. The raids took place at plants in Greeley, Colorado; Grand Island, Nebraska; Cactus, Texas; Hyrum, Utah; Marshalltown, Iowa; and Worthington, Minnesota.1,300 ICE agents were involved in the raids, resulting  in the arrests of nearly 1,300 undocumented immigrant workers.

March, 2007.  New Bedford MA clothing factory owned by Michael Bianco Inc raided resulting in about 350 arrests. Here is Senator Ted Kennedy’s statement about the raid.

May, 2008 Raid on Agriprocessors meat processing plant in Postville IA results in arrest of 1,000 workers.

October 2008, Greenville, SC meat processing plant of House of Raeford raided with arrest of about 350 workers,

July 2009 ICE enforcement action against American Apparel, with over 1,000 unauthorized workers, shows shift in enforcement from mass raids to financial penalties. Here abd here are postings about the shift in focus.

April, 2018. Bean Station, TN factory of Southeastern Provision, a family run meat processing plant, raided resulting in the arrest of about 100 workers.