Complex sentence: Created in 1940 by far-right "Obóz Narodowo-Radykalny" (National Radical Camp) and opposed to more center SZP-ZWZ, it would partially merge with ZWZ around 1941 and finally join AK around fall 1943.
Split into simpler sentences: Created in 1940 by far-right "Obóz Narodowo-Radykalny" (National Radical Camp). It would partially merge with ZWZ around 1941 and finally join AK around fall 1943.