The shell crisis and the problems in Gallipoli cause big political changes.
By May 1915 the anger at the shell crisis on the Western Front and the bad news from Gallipoli meant people didn't trust the government to run the country anymore.
In 1915 women in Britain went on marches calling for changes so that they could do more. In February 1915 the Women's Police Service was set up and in June the government passed the Munitions of War Act. This was part of a plan to get Britain making more ammunition because of the shortages on the Western Front. The Act called for lots of new employees for the munitions factories and 46,000 women applied in the first week. These women become known as Munitionettes.
Prime Minister Herbert Asquith had to make some changes. He formed a coalition. A coalition is when politicians from different political parties join together to run the country.