name a few people from the first group mentioned above who fought in this
Ieronim Uborevich and Leon Trotsky
Battle of Radzymin (1920)
 At the same time the 14th Red Army (under Ieronim Uborevich) captured Wyszków and started a fast march westwards, towards Toruń. It was then to cross the lower Vistula and assault Warsaw from the north-west. However, its 21st Rifle Division remained on the south side of the Bug River and headed for Warsaw directly, under orders from Russia's Commissar of War Leon Trotsky.
in which country/region did the battle of radzymin take place? Poland whom was it fought between? Soviet Red Army and Polish Army
wiki:5552726
Battle of Radzymin (1920) [SEP] August 13
Both Polish and Russian planners expected an attack on Warsaw—and Radzymin in particular—from the east. Yet the first fights started to the north-east of the Polish capital. Warsaw was to be assaulted from the east by the 16th Red Army. At the same time the 14th Red Army (under Ieronim Uborevich) captured Wyszków and started a fast march westwards, towards Toruń. It was then to cross the lower Vistula and assault Warsaw from the north-west. However, its 21st Rifle Division remained on the south side of the Bug River and headed for Warsaw directly, under orders from Russia's Commissar of War Leon Trotsky.