Many tanks were used and/or developed in the 1920-1930 period. That was the "Transitional" period of tank development, although many of the projects were never realized due to a number of reasons: a well meaning, but misguided attempt to "Outlaw War" in the League of Nations; the Great Depression; restrictions from the Treaty of Versailles; limited military budgets, etc.
Hard to tell you where to begin, but for example, there were several late WW1 era vehicles that saw extensive postwar service. My own little company manufactures some of them: The Garford-Putilov, the Filatov, the Ford 3 Ton Tankette, the Euzkadi (a basque tank designed during the 1920s but actually produced for use by the Republicans during the SCW,), etc. Many of these vehicles saw service in the "local struggles" of the period - so, the Rif War, the Russian Civil War, the Spanish Civil War, the Chinese Civil War, etc.
-Alex