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."
Transnational feminism
The UN Decade for Women of 1976-1985, and the following four UN conferences on women between 1975 and 1995 were essential in creating transnational feminist networks and putting feminism on a global agenda. 
However starting in the 1980s there was a separation between Western feminists and Third World feminists. This occurred largely because Western feminists largely subscribed to liberal feminist perspectives, which focused on the common patriarchal oppressor of women, defined by its confining women to the household and traditional work. Liberal feminists propose that women break this oppression by leaving their traditional roles in the household, becoming educated, and entering the labor force. Women in the global South often felt that Western feminism did not represent them and align with their struggles. They felt that Western feminism was ethnocentric and assumed all women had similar situations. Scholars like Chandra Talpade Mohanty plays an integral role in articulating concerns about Western feminism's failure to account for non-Western subjects. She critiques feminism during this time period to be more inclusive of intersectional struggles, identifying that feminism and inequalities are not linear, and the idea of female being a basis of shared oppression invisibilized the individual within their specific context and time. Upon realizing that the common phenomena of capitalist globalization was causing women all over the world to be disproportionately affected (CITE), transnational feminist movements allied together and helped to consolidate the field of transnational feminism.