The shades of  gray in black that usually spells trouble...  
Hired guns.

http://uk.reuters.com/article/worldNews/idUKL1650157920080617

"... although the generally accepted motivation for the coup attempt mentioned above was to seize control of the lucrative oil and gas
contracts."

 http://www.state.gov/e/eeb/ifd/2005/58535.htm

"Equitorial Guinea is a prime case where international actors could seize the opportunity to create incentives for a "young" oil producer to manage its newfound wealth more equitably. "

http://www.publicpolicy.umd.edu/faculty/rosencranz/Week1/oil_report_full.pdf

The moral high ground OR the lessor evil?