History

2. The domino theory is a geopolitical theory which posits that changes in the political structure of one country tend to spread to neighboring countries
5. Active warheads
6. the art or practice of pursuing a dangerous policy to the limits of safety before stopping, especially in politics.
8. a job or profession.
9. the easing of hostility or strained relations, especially between countries.

1. In the event of an attack from an aggressor, a state would massively retaliate by using a force disproportionate to the size of the attack.
3. the practice of spying or of using spies, typically by governments to obtain political and military information.
4. an area in which treaties or agreements between states
6. an act or means of sealing off a place to prevent goods or people from entering or leaving.
7. an effort to protect the citizens of a state (generally non-combatants) from human-made and natural disasters.