33. barrier: a wall or an obstacle
34. mighty: powerful
35. plank: a long, wide, flat piece of wood
36. ally: a friend; a country or person who helps
37. Carthage: area on the northern coast of Africa
38. Punic Wars: fight that lasted more than 100 years
39. Hannibal: a great Carthaginian soldier
40. invade: to take over
41. slavery: people that are as property
42. peace: friendship
43. Alps: mountain range in southern Europe
44. navy: army on the water
45. retreat: move back
46. burn: set fire
47. famine: a long time with no food
48. destroy: to damage
