I21

I21 or I-21 may refer to:

• Japanese submarine I-21, an Imperial Japanese Navy submarine completed in 1941 and sunk in 1943
• Japanese submarine I-121, named I-21 from 1924 to 1938, an Imperial Japanese Navy submarine completed in 1927 and scuttled in 1946,
• Närke Regiment (1816–1892), a Swedish infantry regiment, split from the Närke-Värmland Regiment
• Kalmar Regiment (1893–1927), a Swedish infantry regiment
• Västernorrland Regiment (1928–1974), a Swedish infantry regiment

Topics referred to by the same term

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