A duumvirate is an alliance between two equally powerful political or military leaders. The term can also be used to describe a state with two different military leaders both declare themselves to be the sole leader of the state.
Duumvirates in history include Carthage, ruled by two mayors, and ancient Rome, ruled by two Consuls.
See also
Triumvirate - the equivalent term for three people
The tiny European nation of Andorra is technically a duumvirate, as it is ruled by two co-princes (one of whom is the President of France), although the prime minister actually wields power as the head of government.
Duumvirates in history include the city-states of Carthage, ruled by two mayors, and ancient Rome, ruled by two Consuls.
Duumvirates are rare in human history and are inherently unstable, as one of the two rulers will almost invariably seek greater power and, eventually, dominance.
This designation is used demagogically by the AWL duumvirate as yet another damning piece of evidence which goes to prove the CPGBs continuing Stalinist world outlook.
Presumably in 1978 the AWL duumvirate looked upon the fractious mujahedin groups as heroic resistance fighters as they began to impose their counterrevolutionary grip over the countryside and ruthlessly hunt down infidels and communists.
Obviously a straw man suits the purpose of the AWL duumvirate better than one made of flesh and blood who is capable of hitting back.