This is a political poster, published (according to its caption) in 1913 by the Women’s Social and Political Union, which was a militant suffragette organization in Great Britain during the early years of the 20th century. The poster may celebrate the plight of activist Kitty Marion, who was force fed hundreds of times during various prison hunger strikes after being arrested for violent suffragette activity. (A photograph of Kitty in the hands of the police can be seen on that same page.) However, most internet sources suggest that it references the many suffragettes who were subjected to prison force-feeding during that era.
Image provenance by Bacchus at Erosblog.