Arkadii Chadik was born in 1905. Before the war he lived in Simferopol, from which he was called up for military service in 1941. He fought on the Crimean and First Belorussian Fronts with the rank of junior lieutenant as commander of a battery of self-propelled guns.
On February 7, 1945, during fighting for the liberation of Poznań, a Soviet rifle-regiment battalion, augmented by three self-propelled gun batteries, was surrounded. With a military vehicle from his command post Junior Lieutenant Chadik succeeded in reaching the gun batterias and bringing ammunition to them. On the return trip the vehicle was hit and the young commander was killed. Chadik was buried on Heroes Alley in Poznań's military cemetery. He was posthumously awarded the Order of the Patriotic War, 2nd class.