Ko te whakaeke matū o Khan Shaykhun i te 4 o Paenga-whāwhā 2017 i whakawakia e te ao whānui, ā, i hua ai te mahi hōia a U.S.
ki te turanga rererangi a te kāwanatanga o Hiria i Shayrat. Ko te whakaeke matū i Douma i te 7 Paenga-whawha 2018 i whakawhiwhia ki te whakautu hoia mai i te United States, United Kingdom me France.