Dee ihe na-aga n'ihu maka paragraf a - N'agbanyeghị nke ahụ, n'afọ ndị sochirinụ, e ji ngwá agha ndị e ji eme ihe n'ụzọ dịgasị iche iche mee ihe, karịsịa n'agha ndị e ji alụ agha n'ebe ndị ọzọ na-achị, bụ́ ebe otu akụkụ nwere ihe ka mma n'ihe banyere ngwá agha karịa nke ọzọ. Ndị Britain jiri gas na-egbu egbu, ikekwe adamsite, megide ndị agha mgbanwe nke Russia na-amalite na 27 August 1919 ma tụlee iji ngwa agha kemịkal megide ndị nnupụisi Iraq na 1920s; Ndị agha Bolshevik jiri gas na-egbu egbu iji kwụsị Nnupụisi Tambov
Na 1920, Spain jiri ngwa agha kemịkal na Morocco megide ndị agbụrụ Rif n'afọ ndị 1920 na Italy jiri gas mustard na Libya na 1930 na ọzọ n'oge mwakpo ya na Ethiopia na 1936. N'afọ 1925, otu onye agha China, bụ́ Zhang Zuolin, nyere otu ụlọ ọrụ Germany ọrụ iwu otu ụlọ ọrụ na-emepụta gas a na-akpọ mustard gas na Shenyang, bụ́ nke e wuchara n'afọ 1927.