The resistance in Sittard was led unchallengedly by M.P.J.M. Corbeij. He had been mayor of Broeksittard from 1934 until his dishonorable resignation in 1941. Before the war he had also worked for military intelligence. He was not well received by some because he was a teetotaler. 
Sittard formally belonged to the district of Heerlen, but for security reasons they cooperated as little as possible with other resistance organizations, except occasionally with the K.P. of Heerlen, as in the raid on a C.C.D. warehouse in Heerlen in the spring of 1944 and in the raid on the distribution office in Valkenburg, when the K.P. Sittard made its fire truck available, that was stolen in Geleen and armored in Matrai’s workshop.
Thanks to their extremely prudent approach, not a single resister from the circle around Corbeij fell into the hands of the Germans, which did not alter the fact that the Sittard organization had to watch helplessly as the security police (SiPo) from Maastricht, in cooperation with Dutch collaborators of the Landwacht and Arbeidscontroledienst who were rounded up from all over the province, carried out a raid against the hiders on July 28, 1944. Every neighborhood in Sittard was combed by an arrest team.
Relatively little remains about the resistance in Sittard.
Some things can be found in the book of Cammaert in Het verborgen front (The Hidden Front), chapter VIb, De Landelijke Organisatie voor hulp aan onderduikers, § VIII.6. District Sittard. p. 686-691 
See also Dolf Simonis, oorlog en verzet in Sittard . Simonis led the combat group (Knokploeg) in Sittard. His courier was his 10-year-old daughter Jeanne, who also knew where her father hid his weapons, in case he was arrested.
See also the list of war victims on the war memorial in Sittard 
|All the fallen resistance people in Limburg|
Sittard – 12 pers.
| - Sittard - Jews in resistance - Laboratory employee at the oil company B.P.M., member of the resistance.  What kind of resistance he did, in which organization and how he was caught, we don’t know (yet). - …|
This person is not (yet?) listed on the walls of the chapel.04-04
| - Initial resistance - Group Smit - Sittard - Police - Leo Bruls from Sittard was an aircraft mechanic and aviator at the Militaire Luchtvaartafdeling (Military Aviation Department) in Soesterberg. Today it is called the Koninklijke …|
wall: right, row 17-04
| - Sittard - Frederik Joseph Antonius (Frits) Clemens was a miner and football player with the Sittardsche Boys, KNVB Limburg. “The SiPo-Maastricht …|
wall: right, row 19-01
| - Ondergrondse pers - Sittard - Communists & Sympathizers - Paul Crauwels was born in Oud-Vroenhoven, municipality of Maastricht, and was a typesetter. [1#5]Machine setter at Alberts Printers in Sittard as well as working in …|
wall: right, row 18-01
Jan Willem Hubertus Marie
Kdo HU-Schwesing, Neuengamme
| - Forced Labor - Sittard - Willy Dols was a teacher of Dutch and a gifted linguist, who made an accurate study of the Sittard diphthong . He spent part of the school vacations in 1944 with his sister in …|
wall: right, row 18-02
Van der Maas/ Niek
Fort Rhijnauwen (prov. Utrecht
| - Initial resistance - Erkens Group - Maastricht - Sittard - Nicolaas Egidius Erkens was married to a Liège woman, he spoke French well and was an organizer of cross-border resistance to Belgium, especially with regard to smuggling refugees (|
wall: right, row 18-03
| - Sittard - Franciscus Marinus Caspar Marie Eyck was a wholesaler. “The SiPo-Maastricht led a more or less nomadic existence since early September …|
wall: right, row 18-04
| - Sittard - People in hiding - Willem Hubert Geurts was arrested in Sittard on July 20, 1944 for “evading employment in Germany.”. - contact -->According tooorlogsgravenstichting: † Berga/Elster, |
wall: middel, row 19-02
| - Sittard - Maastricht - Eugène Petrus Hubertus Hougardy, hotelier and pub owner (in Sittard?), × Maria Catharina Janssen. - contact -->|
wall: right, row 18-05
| - Sittard - Ordedienst (O.D.) - Nicolaas Antonius van der Laak was a mechanical engineer , manager and member of the resistance.  - contact -->He died due to the privations he suffered. [1#3]His wife …|
This person is not (yet?) listed on the walls of the chapel.04-20
| - Sittard - The SiPo-Maastricht led a more or less nomadic existence since early September 1944. During their stay in Maasniel in mid-September, …|
wall: right, row 17-05
| - Sittard - Factory worker. Arrested on June 15, 1944, reason for arrest: Shirking forced labor.monument.vriendenkringneuengamme.nl: † May, 5 1945, Neuengammeoorlogsgravenstichting.nl: † …|
wall: middel, row 21-01