Complex sentence: Van Hoëvell enrolled in the University of Groningen in 1829 and studied theology, and in 1830 briefly saw military action in Belgium, during the abortive attempt by the North-Netherlands to maintain the unity of the United Kingdom of the Netherlands.
Split into simpler sentences: Van Hoëvell enrolled in the University of Groningen in 1829 and studied theology. In 1830 he briefly saw military action in Belgium, during the abortive attempt by the North-Netherlands to maintain the unity of the United Kingdom of the Netherlands.