mesopotamia

3. the action or process of sailing or otherwise traveling all the way around something, especially the world.
4. limited supply
6. meeting and market place of rome
8. raw materials of history
9. In Medieval Europe, lords granted land to vassals in exchange for military
11. an animal, as the horse or cat, that has been tamed and kept by humans as a work animal, food source, or pet, especially a member of those species that have, through selective breeding, become notably different from their wild ancestors.
14. a number or body of persons or animals moving together.
15. First writing system (mesopotamia)

1. First written laws (mesopotamia)
2. knights from Europe wanted to stop muslims from controlling jerusalem
5. Products of earth (wood, oil)
7. Creating steps to farm on slope
10. Physical labor
12. Bringing water to a dry area
13. the state or quality of being resistant to a particular infectious disease or pathogen.