Liberals helped to elect Barack Obama in part because of his opposition to the Iraq war, and probably don’t celebrate all of the president’s many military accomplishments. But they are sizable.

Mr. Obama decimated Al Qaeda’s leadership. He overthrew the Libyan dictator. He ramped up drone attacks in Pakistan, waged effective covert wars in Yemen and Somalia and authorized a threefold increase in the number of American troops in Afghanistan. He became the first president to authorize the assassination of a United States citizen, Anwar al-Awlaki, who was born in New Mexico and played an operational role in Al Qaeda, and was killed in an American drone strike in Yemen. And, of course, Mr. Obama ordered and oversaw the Navy SEAL raid that killed Osama bin Laden.

Ironically, the president used the Nobel Peace Prize acceptance speech as an occasion to articulate his philosophy of war. He made it very clear that his opposition to the Iraq war didn’t mean that he embraced pacifism — not at all.