Transnational feminism
In the "Oxford Handbook of Transnational Feminist Movements", Valentine Moghadam says that "women have worked together across borders since at least the mid-1800s. (55)" What is now called first wave feminism started in the early twentieth century in the West with a focus on women's suffrage. 
During World War II, the United States government gave women jobs because the war had caused a national shortage of labor. After the war ended, Irene Tinker says (oxford transnational), these jobs were taken away but women were no longer satisfied going back to their previous gender roles. Starting in the 1960s in the United States, second wave feminism emerged, defined by women's organization around "equal right to education, employment, and equal pay for equal work, and on sexual and reproductive rights."
History of feminism
The expression "Women's Liberation" has been used to refer to feminism throughout history. "Liberation" has been associated with feminist aspirations since 1895, and appears in the context of "women's liberation" in Simone de Beauvoir's 1949 "The Second Sex", which appeared in English translation in 1953. The phrase "women's liberation" was first used in 1964, in print in 1966, though the French equivalent, "libération des femmes", occurred as far back as 1911. "Women's liberation" was in use at the 1967 American Students for a Democratic Society (SDS) convention, which held a panel discussion on the topic. In 1968, the term "Women's Liberation Front" appeared in "Ramparts" magazine, and began to refer to the whole women's movement. In Chicago, women disillusioned with the New Left met separately in 1967, and published "Voice of the Women's Liberation Movement" in March 1968. When the Miss America pageant took place in Atlantic City in September 1968, the media referred to the resulting demonstrations as "Women's Liberation". The Chicago Women's Liberation Union was formed in 1969. Similar groups with similar titles appeared in many parts of the United States. Bra-burning, although fictional, became associated with the movement, and the media coined other terms such as "libber". "Women's Liberation" persisted over the other rival terms for the new feminism, captured the popular imagination, and has endured alongside the older term "Women's Movement".