Complex sentence: He continued Veranius's policy of aggressively subduing the tribes of modern Wales, and was successful for his first two years in the post, and his reputation as a general came to rival that of Gnaeus Domitius Corbulo.
Split into simpler sentences: He continued Veranius's policy of aggressively subduing the tribes of modern Wales, and was successful for his first two years in the post. His reputation as a general came to rival that of Gnaeus Domitius Corbulo.