Fatimah participated in the Battle of the Trench and brought bread to the Messenger of Allah; this is the mosque built at that place

During the Battle of the Trench (H. 5/M. 627), Muslim women supported the war in various ways: they carried water, treated the wounded, and took on supply services. Fatimah personally went to her father to bring him food; according to narrations, the place where she baked bread with her own hands gave its name to this mosque. Sa'd b. Mu'az, as the leader of the Aws tribe during the Battle of the Trench, took on significant roles among the Muslims. He was severely wounded by an arrow during the battle; one of the veins in his arm was severed. The Prophet treated him in a tent at the Prophet's Mosque. Sa'd b. Mu'az made decisions as a judge in the trial of Banu Qurayza after the Battle of the Trench; he later became a martyr when his wound reopened and could not be stopped from bleeding. The Mosque of Sa'd b. Mu'az is shown southwest of the Mosque of Umar b. Khattab on the 1947 map of Medina by Salih Lem'i Mustafa; it is also referred to as the Mosque of Fatimah in some sources. [Source: "Mesâcid-i Seb'a", TDV Islamic Encyclopedia, https://islamansiklopedisi.org.tr/mesacid-i-seba; "Sa'd b. Muâz", TDV Islamic Encyclopedia, https://islamansiklopedisi.org.tr/sad-b-muaz]