Kammala wannan jumla: 'Yan kungiyar Jaysh al-Ummah sun yi ikirarin cewa an kafa kungiyarsu ne a shekarar 2005. Koyaya, masu bincike sun fara farawa a maimakon 2007 ko 2008. Tun lokacin da aka kafa ta, kungiyar ta fi mayar da hankali kan harba rokoki da sauran abubuwan fashewa zuwa yankin Isra'ila. A watan Janairun 2008, kungiyar ta sanar da cewa tana shirin kashe Shugaban Amurka George W. Bush. A ranar 1 ga Satumba, 2008, kungiyar ta shirya "taron horar da jama'a" na farko a kudancin Gaza, ta yi amfani da damar don sukar gwamnatin Hamas ta Gaza. Kwana biyu bayan haka, Hamas ta kama shugaban Jaysh al-Ummah Abu Hafs al-Maqdisi, wanda ya sa kungiyar ta yi barazanar mayar da martani ta hanyar tashin hankali sai dai idan an saki kwamandan su. Bayan haka, bangarorin biyu sun zama gaba daya makiya, tare da Jaysh al-Ummah da ke watsi da duk wata yarjejeniyar tsagaita wuta da aka amince tsakanin Hamas da Isra'ila, yayin da Hamas za ta riƙa kama mambobin Jaysh al-Ummah. Duk da haka, ƙungiyoyin biyu sun guji yin yaƙi a fili. Jaysh al-Ummah sun yi yaƙi a cikin
Rikicin Gaza na 2012 da Yaƙin Gaza na 2014 da Isra'ila.