Complex sentence: The pro-German faction of Vargas'regime was strongest in the military, while its elite were divided, most were sympathetic to the Allies because of Brazil's established economic ties with the United States and the United Kingdom.
Split into simpler sentences: The pro-German faction of Vargas'regime was strongest in the military while its elite were divided. Most were sympathetic to the Allies because of Brazil's established economic ties with the United States and the United Kingdom.