Classic military unit groupings differ greatly in their specialization and size, and from country to country. Here is a basic look at how modern ground, naval, and air units break down in terms of si…

Political volatility among the world’s leading oil producers suggests deeper causes for recent price spikes.

With talk of deploying NATO peacekeepers to patrol the Lebanese border, the alliance is tackling new challenges outside of Europewhile looking to recruit new members. Not everyone, however, supports …

The Gulf of Mexico oil spill spotlights the growth of deepwater drilling and the challenges of balancing strong environmental regulation with efforts to expand U.S. domestic oil production.

Non-OPEC oil producers, which turn out most of the world’s oil, are operating near capacity.