Final answer:
The period of time after World War II until the early 1960s when millions of babies were born in the United States is commonly referred to as The Baby Boom.
Step-by-step explanation:
The period of time after World War II until the early 1960s when millions of babies were born in the United States is commonly referred to as The Baby Boom.
The Baby Boom was a result of several factors, including the return of military personnel from World War II, the desire of young Americans to start families, and economic stability allowing established couples to have more children.
An estimated 80 million Americans were born during this time period, making it the largest generation in the nation's history.