Complex sentence: Their win broke the stranglehold that the East Coast corps had held on the national championships; although the win was considered by those same East Coast corps to be just a fluke, the Cavies repeated as VFW champions two years later in Los Angeles.
Split into simpler sentences: Their win broke the stranglehold that the East Coast corps had held on the national championships. Although the win was considered by the East Coast corps to be just a fluke, the Cavies repeated as VFW champions two years later in Los Angeles.