Following the fall of Khartoum on 26 January 1885, Graham led a second expedition in March 1885. This expedition is sometimes referred to as the Suakin Field Force. Its purpose was to defeat Mahdist forces under Osman Digna in the region and to supervise and protect the construction of the Suakin-Berber Railway. A week after its arrival in Suakin, the expedition fought in two actions: the Battle of Hashin or Hasheen on 20 March, and the Battle of Tofrek on 22 March.