Complete the following sentence: The 1920 Revolution Brigades (Arabic كتائب ثورة العشرين "Kitā'ib Thawrat al-ʿIshrīn") is a Sunni militia group in Iraq, which includes former members of the disbanded Iraqi army. <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk>
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