Complex sentence: Having quickly found abundant fossils of large mammals, Dubois was relieved of his military duties (March 1889), and the colonial government assigned two engineers and fifty convicts to help him with his excavations.
Split into simpler sentences: Having quickly found abundant fossils of large mammals, Dubois was relieved of his military duties (March 1889). The colonial government assigned two engineers and fifty convicts to help him with his excavations.