Targeted operations by U.S. forces have eliminated notorious leaders of armed extremist groups, al-Qaeda’s Ayman al-Zawahiri the latest among them. But how much they disrupt these terrorist organizat…

Fearing an invasion of Ukraine, the U.S. government is vigorously trying to head off alleged Russian plots and misinformation campaigns. The efforts have opened a new front for competition between th…

The death of Abu Ibrahim al-Hashimi al-Qurayshi is unlikely to pose a major setback for the group, which has already mounted serious attacks in Iraq and Syria this year.

Fears of a Russian military offensive against Ukraine are back. NATO should bolster support for Kyiv and the United States should signal new efforts to thwart a controversial Russian energy pipeline…

Despite having larger numbers and better equipment than the Taliban, Afghan forces were never strong enough to sustain government control in the absence of U.S. firepower.