Boris Alexeyevich Smyslovsky (Russian: Борис Алексеевич Смысловский; 3 December 1897 – 5 September 1988), also known under the pseudonyms Hauptmann von Regenau and (later) Arthur Holmston (Russian: Артур Хольмстон), was a Russian-Finnish general, émigré and anti-communist. He commanded the pro-Axis collaborationist First Russian National Army during World War II.