Complex sentence: In Virginia, independent city status guarantees protection against annexation of territory by adjacent communities, so in 1952, the remaining area (71 sq mi/184 sq km) of Warwick County became an independent city.
Split into simpler sentences: In Virginia, independent city status guarantees protection against annexation of territory by adjacent communities. In 1952, the remaining area (71 sq mi/184 sq km) of Warwick County became an independent city.