Kadsreius Sentanese Republic (KSR) was a partially-recognized territory of the Sentanese Empire established in 1940 by exiled Sentanese general Hiroshi Kayos with newly-built Eirabourne as its capital. KSR was never recognized by most nations and claimed to be the part of the Sentanese Empire.

KSR later invaded three of Sentanese Empire's islands and the Vicnoran province of Vicnoran Sentan in 1950 during the Eight-Day War, which will later become the Republic of El Kadsre.

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