Complex sentence: After two decades in service, it was decommissioned in 1973, and the same year the Peruvian Navy bought the ship as a counter to the acquisition of the Swedish cruiser "Gota Lejon" by the Chilean Navy.
Split into simpler sentences: After two decades in service, it was decommissioned in 1973. On the same year the Peruvian Navy bought the ship as a counter to the acquisition of the Swedish cruiser "Gota Lejon" by the Chilean Navy.