The exact size, of course, depends on the playing time (in minutes and seconds), on how good the original compresses and the compression quality. 1 Mb a minute is a good approximation, in practice. I wouldn't trust 2 Gb to hold 1000 average downloaded songs. Just go for 4.
The causes of the Vietnam War were derived from the symptoms, components and consequences of the Cold War. The causes of the Vietnam War revolve around the simple belief held by America that communism was threatening to expand all over south-east Asia.
Vietnam War Weapons (1955-1975) The Vietnam War utilized a wide mix of small arms, airpower, naval systems and armored vehicles - but gains and losses were still decided by the 'Boots-on-the-Ground'. The Vietnam War stemmed from a culmination of rising tensions, alliances and expansion of ideologies during of the Cold War primarily fought between the Soviet Union and the West. One battlefield for the war became Southeast Asia involving the nations of Vietnam, Cambodia and Laos. Communist-backed North Vietnamese forces squared off against the democratic South Vietnamese (allied with the United States) that produced a bloody conflict taking thousands of lives.