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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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SM_U-31_(Austria-Hungary) entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-04-27 and was most recently seen on 2026-04-27.
SM U-31 or U-XXXI was a U-27 class U-boat or submarine for the Austro-Hungarian Navy. U-31, built by the Hungarian firm of Ganz Danubius at Fiume, was launched in March 1917 and commissioned in April.
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