Final answer:
The military change that helped bring about democracy was the overthrow of authoritarian regimes and the implementation of democratic elections.
Step-by-step explanation:
The military change that helped bring about democracy is when authoritarian regimes were overthrown and democratic elections were implemented. This shift towards democracy occurred in several countries in the mid-1970s, such as Portugal, Spain, Taiwan, and South Korea.
The dismantling of empires at the end of World War II also contributed to the spread of democracy. It is important to note that while the military played a role in bringing about democracy, the success of democracy depends on various factors including political institutions, economic power distribution, and social structures.