The following two missions were the peace enforcement missions where the UN troops had to physically fight: 1) The UN Operation in Congo (UNOC): started on July 14, 1960 with the Security Council Resolution 143 and continued until June 1964; 2) The UN Operation in Somali (UNOSOM II): started on March 26, 1993 with the Security Council Resolution 814 and continued until March 1995 under the leadership of the USA. The correct answer is B.