[quote=The Slenderman]
Zero started spreading stories about him. Some of these tales were true, some exaggerated, and others were outright lies. Big Boss expressed strong misgivings towards Zero's sometimes lopsided and unreasonable demands for control (i.e. lust for power). Big Boss became sick of playing the role of a puppet.
[/quote]

1. Check your math. If he was born in 1935 he would be WAY older then 42. 
2. What does all that history have to do with anything? 
3. What has he been doing 1964? How did he react to the invasion?