In 1990, Mills became the first and only women's college in the US to reverse a decision to go coed.[23] On May 3, 1990, Mills Trustees announced that they had voted to admit male undergraduate students to Mills.[24] This decision led to a two-week student and staff strike, accompanied by numerous displays of non-violent protests by the students.[25][26] At one point, nearly 300 students blockaded the administrative offices and boycotted classes.[27] On May 18, the Trustees met again to reconsider the decision, leading to a reversal of the vote to go coed on the undergraduate level.[28]