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."
Oppression
Although a relatively modern form of resistance, feminism's origins can be traced back to the events leading up to the introduction of the Equal Rights Amendment (ERA) in 1923. While the ERA was created to address the need for equal protection under the law between men and women in the workplace, it spurred increased feminism that has come to represent the search for equal opportunity and respect for women in patriarchal societies, across all social, cultural, and political spheres. Demonstrations and marches have been a popular medium of support, with the January 21, 2017, Women's March's replication in major cities across the world drawing tens of thousands of supporters. Feminists' main talking points consist of women's reproductive rights, the closing of the pay gap between men and women, the glass ceiling and workplace discrimination, and the intersectionality of feminism with other major issues such as African-American rights, immigration freedoms, and gun violence.