Tullus Hostilius was the third king of ancient Rome, succeeding Numa Pompilius. He ruled from 672 to 641 BC and is known for his military focus and expansionist policies. Tullus is credited with the conquest of the neighboring city of Alba Longa, which strengthened Roman power in the region. Under Tullus Hostilius, Rome also saw the establishment of important religious and political institutions. He is often remembered for his aggressive approach to warfare and his efforts to unite the Roman tribes. His reign ended with his death, which was said to be caused by a lightning strike, marking a dramatic end to his rule.