They were poor so the went into debt
Answer:
Their system of mathematics.
Explanation:
The Maya discovered zero. Most of the world's civilizations had no concept of zero at the time of the Mayans. Without zero there would be: No algebra, no arithmetic, no decimal, no accounts, no physical quantity to measure, no boundary between negative and positive numbers, and no computers. The Mayan’s discovery of zero was one of the most significant steps to get to where we are today.
The counting system was so simple. The Mayans figured out a genius system of counting which only required three symbols, a dot, a line, and a shell. These three symbols could be used in various combinations to keep track of the calendar and do arithmetic. Even the most uneducated people could use it to do basic trade.
"mi casa es tu casa" is how you spell it
Tony Stark and Captain America jk sorry.
The Union and Confederates
The correct answer is "Increased death toll and violence of King Philip's War Native Americans' "
The Iroquois were provided with firearms through the Hudson River from the Dutch and English merchants, which reverberated as more casualties in the war, once guns were deadlier than their usual weapons. Iroquois war now had greater tolls, increasing the practice of "Mourning Wars", a technique where the Iroquois took captives of neighboring groups, submitted them into a ritual and then they were adopted to replace the dead Iroquois. The tribe ascended into a war and violence vicious cycle. With the advent of diseases the ferret village was almost completely destroyed in 1650.