post-Armistice
/ˌpəʊstˈɑːmɪstɪs/(also post-armistice)
adjective
Occurring or taking place during the period immediately following the Armistice of 11 November 1918, which marked the end of the First World War (1914–18).
Origin
Early 20th century; earliest use found in The Times. From post- + armistice.