Nine years after U.S. troops toppled Saddam Hussein and just a few months after the last U.S. soldier left Iraq, the country has become something close to a failed state.

The United States, facing deepening economic and fiscal woes at home, is preparing to withdraw from Afghanistan.

Abandoning counterinsurgency doctrine after Afghanistan would doom the U.S. military to irrelevance and impotence, writes Christopher Sims and Fernando Luján. Not so, says Bing West; like it or not, the United States will be much less ambitious in future wars.

Opponents of military action against Iran assume a U.S. military strike would be far more dangerous than simply letting Tehran build a bomb. Not so, argues this former Pentagon defense planner. With a carefully designed strike, Washington could mitigate the costs—or at least bring them down to a bearable level—and spare the region and the world from an unacceptable threat.

The United States gives Pakistan billions of dollars in aid each year. Pakistan returns the favor by harboring terrorists, spreading anti-Americanism, and selling nuclear technology abroad. Washington must tell Islamabad to start cooperating or lose its aid and face outright isolation.

As the United States looks ahead, it faces two central challenges in foreign policy: enlarging the zone of prosperity and democracy in the West while balancing the rise of China and allaying the fears of the United States' Asian allies.

It's tempting to see the 9/11 attacks as having fundamentally changed U.S. foreign policy. It's also wrong.

If the United States is interested in leaving behind a better Afghanistan than the one it found, it needs to take the experiences of past invasions to heart.

Two documentaries on the Afghan war, Restrepo and Armadillo, show how a combination of overwhelming military resources and aggressive counterinsurgency ultimately leads to frustration on the battlefield.

Two documentaries on the Afghan war, Restrepo and Armadillo, show how a combination of overwhelming military resources and aggressive counterinsurgency ultimately leads to frustration on the battlefield.

Since taking office, the Obama administration has ramped up the U.S. drone program in Pakistan.

As the recent fiasco with body scanners at airports demonstrated, the United States' homeland security strategy is off track.

Richard A. Falkenrath says that with Osama bin Laden gone, life is about to become more complicated for U.S. policymakers trying to combat terrorism.

India is planning to buy $100 billion worth of new weapons over the next ten years.

The surge of U.S. troops into Iraq helped decrease violence and set the stage for the eventual U.S. withdrawal.

Two recent books cast doubt on the value of the existing laws of war when it come sto safeguarding civilians in an age of unconventional conflict.

As U.S. marines fought in Marja last year, they captured the weapons used by Taliban fighters.

Pentagon budgets have soared over the last decade, partly because of a failure to prioritize.

The surge in Iraq demonstrated the importance of understanding the influence of culture on warfare.

Washington and its allies could still win in Afghanistan if they are given the time they need.