The Oil Drum

Er,the mayhem started almost 5 years ago.  Looking backwards, most of the 20th century wars had oil as a motive or deciding factor.
WWI: Germany wanted the Baghdad-Berlin railway to deliver oil, the British didn't want them to get it.
WWII: Germany made runs at the North African and Azerbijan oil fields, Japan temporarily captured SE Asian oil.
The Cold War: ended in part with USSR peak oil plus Saudi Arabia flooding the market with cheap crude to cut off the USSR's hard currency supply.
US-Iraq War I (1990-1991): self explanatory
It never ceases to amaze me that over half of people who believe in geological peak oil deny that the constant warfare of this century is all about oil as well.