Complex sentence: Early in his career he was known as Corporal Kirchner and is known in North America for his brief feud with Nikolai Volkoff in the WWF in 1986 which included a victory over Volkoff at WrestleMania 2 in a Flag Match.
Split into simpler sentences: Early in his career he was known as Corporal Kirchner. He is known in North America for his brief feud with Nikolai Volkoff in the WWF in 1986 which included a victory over Volkoff at WrestleMania 2 in a Flag Match.