The three "Maine"-class battleships—, , and —were built at the turn of the 20th century for the United States Navy. Based on the preceding , they incorporated several significant technological advances over the earlier ships. They were the first American battleships to incorporate Krupp cemented armor, which was stronger than Harvey armor, smokeless powder, which allowed for higher-velocity guns and water-tube boilers, which were more efficient and lighter. The "Maine"s were armed with four guns and sixteen guns, and they could steam at a speed of , a significant increase over the "Illinois" class.