I am not positive, but I think the problem was the Americans were getting too cozy and would have taken Cuba over as the next state and revolutionaries didn't want the Americans taking over their country. They were taking control of almost everything, oil/gas, agriculture, and business. Perhaps they saw how Americans lived to excess and how they didn't seem to get any further along, but yet the Americans who would come and stay got rich and prospered and the locals still weren't getting anywhere....I can't say for sure, but this is kinda what the jist was of a documentary on Castro and Cuba I watched last week....
2007 Victory & Triumph
2008 Conquest & Liberty
2009 Valor, Freedom, and Splendor
2010 Glory and Liberty