Inner Mongolia (China)

Inner Mongolia or Mengjiang (Meng Chiang), northeast China, north to the independent (Outer) Mongolia. I don't know by heart the exact dates of its existence nor what the official political status was. It used a flag of light blue with a canton of vertical red-yellow-white (order ?) in unequal widths (the flag is in Whitney Smith's "big" book and e.g. in a recent issue of the Flagmaster).
Harald Mueller 11 December 1995

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The flag adopted 28 June 1936. There were different, possibly earlier, versions of this flag: one with the stripes in the canton horizontally, one with stripes vertically and unequal, and one with stripes vertically and equal. According to Flagmaster no.79 it is most likely the latter one that was the official one.
Mark Sensen 26 June 1996

The Japanese controlled Inner Mongolia where was constituted an "Autonomous Council" in 1934. On 8 December, 1937, in advance of the Japanese invasion of China, the Mongolian Prince Teh Wang proclaimed independence, signed a cooperation agreement with Manchokuo, and adopted for the country the name of MENGKUKUO (as given in Spanish sources; Meng Chiang is the name used in English sources). The capital was established at Chan Pei, near Kalgan. Chinese dominance of the area ended after the murder of a Chinese delegate on 24 January, 1938. The Japanese imposed a government, in which the principal ministers were Japanese. In August 1945, the Mengkukuo went over to the communists, with Soviet help. I think that the earliest flags predate 1937 - perhaps between 1934 and 1937, or even earlier. Some sort of flag was presumably adopted in 1929 when the region of Burga was constituted as a republic for some months.
Jaume Ollé 30 June 1996

The only name I have ever heard is "Mengjiang" (or "Meng Chiang)" although "Mengguguo" also makes sense (both "guo" and "jiang" mean land, the latter rather in a geographical context and the former in a political context). On the coins or banknotes only "Mengjiang" is used, but they were issued by the Japanese puppet government. So possibly, "Mengguguo" was used between 19