Complex sentence: Even though in 1938, Buchman chose to rename the Group and call it Moral Re-Armament, in June 1939, he applied to the Board of Trade in London to incorporate the name Oxford Group.
Split into simpler sentences: Even though in 1938, Buchman chose to rename the Group and call it Moral Re-Armament. In June 1939 he applied to the Board of Trade in London to incorporate the name Oxford Group.