GC: n

S: http://www.un.org/en/peacekeeping/issues/military.shtml (last access: 28 February 2013); http://pbpu.unlb.org/pbps/library/capstone_doctrine_eng.pdf (last access: 2 September 2014).

N:
S:

SYN: Blue berets

S: http://www.un.org/en/peacekeeping/issues/military.shtml (last access: 28 February 2013)

CR: peace-keeping