Question:
William James Dixon (July 1, 1915 - January 29, 1992) was an American blues musician, vocalist, songwriter, arranger and record producer. He was proficient in playing both the upright bass and the guitar and was a capable singer, but he is perhaps best known as one of the most prolific songwriters of his time. Next to Muddy Waters, Dixon is recognized as the most influential person in shaping the post-World War II sound of the Chicago blues. Dixon's songs have been recorded by countless musicians in many genres as well as by various ensembles in which he participated.
Dixon left Mississippi for Chicago in 1936. A man of considerable stature, standing 6 and a half feet tall and weighing over 250 pounds, he took up boxing, at which he was successful, winning the Illinois State Golden Gloves Heavyweight Championship (Novice Division) in 1937. He became a professional boxer and worked briefly as Joe Louis's sparring partner, but after four fights he left boxing in a dispute with his manager over money. Dixon met Leonard Caston at a boxing gym, where they would harmonize at times. Dixon performed in several vocal groups in Chicago, but it was Caston that persuaded him to pursue music seriously. Caston built him his first bass, made of a tin can and one string. Dixon's experience singing bass made the instrument familiar. He also learned to play the guitar. In 1939, Dixon was a founding member of the Five Breezes, with Caston, Joe Bell, Gene Gilmore and Willie Hawthorne. The group blended blues, jazz, and vocal harmonies, in the mode of the Ink Spots. Dixon's progress on the upright bass came to an abrupt halt with the advent of World War II, when he refused induction into military service as a conscientious objector and was imprisoned for ten months. He refused to go to war because he would not fight for a nation in which institutionalized racism and racist laws were prevalent. After the war, he formed a group named the Four Jumps of Jive. He then reunited with Caston, forming the Big Three Trio, which went on to record for Columbia Records.
Answer this question using a quote from the text above:

Did he run into any other trouble?

Answer:

Answer the question at the end by quoting:

The indigenous peoples of the Americas are the pre-Columbian peoples of the Americas and their descendants. Although some indigenous peoples of the Americas were traditionally hunter-gatherers--and many, especially in the Amazon basin, still are--many groups practiced aquaculture and agriculture. The impact of their agricultural endowment to the world is a testament to their time and work in reshaping and cultivating the flora indigenous to the Americas. Although some societies depended heavily on agriculture, others practiced a mix of farming, hunting and gathering.
The Pre-Columbian era refers to all period subdivisions in the history and prehistory of the Americas before the appearance of significant European and African influences on the American continents, spanning the time of the original arrival in the Upper Paleolithic to European colonization during the early modern period. While technically referring to the era before Christopher Columbus' voyages of 1492 to 1504, in practice the term usually includes the history of American indigenous cultures until Europeans either conquered or significantly influenced them. "Pre-Columbian" is used especially often in the context of discussing the pre-contact Mesoamerican indigenous societies: Olmec; Toltec; Teotihuacano' Zapotec; Mixtec; Aztec and Maya civilizations; and the complex cultures of the Andes: Inca Empire, Moche culture, Muisca Confederation, and Canari. The Norte Chico civilization (in present-day Peru) is one of the defining six original civilizations of the world, arising independently around the same time as that of Egypt. Many later pre-Columbian civilizations achieved great complexity, with hallmarks that included permanent or urban settlements, agriculture, civic and monumental architecture, and complex societal hierarchies. Some of these civilizations had long faded by the time of the first significant European and African arrivals (ca. late 15th-early 16th centuries), and are known only through oral history and through archaeological investigations. Others were contemporary with the contact and colonization period, and were documented in historical accounts of the time. A few, such as the Mayan, Olmec, Mixtec, and Nahua peoples, had their own written languages and records. However, the European colonists of the time worked to eliminate non-Christian beliefs, and burned many pre-Columbian written records. Only a few documents remained hidden and survived, leaving contemporary historians with glimpses of ancient culture and knowledge. According to both indigenous American and European accounts and documents, American civilizations before and at the time of European encounter had achieved great complexity and many accomplishments. For instance, the Aztecs built one of the largest cities in the world, Tenochtitlan, the ancient site of Mexico City, with an estimated population of 200,000. American civilizations also displayed impressive accomplishments in astronomy and mathematics. The domestication of maize or corn required thousands of years of selective breeding, and continued cultivation of multiple varieties was done with planning and selection, generally by women. Inuit, Yupik, Aleut, and American Indian creation myths tell of a variety of origins of their respective peoples. Some were "always there" or were created by gods or animals, some migrated from a specified compass point, and others came from "across the ocean".

What else did they do during that time?
the Aztecs built one of the largest cities in the world,