NATO allies have agreed to commit to spending 5% of GDP on defence spending and related infrastructure by 2035, according to ...

Before World War One broke out, alliances were made to keep the peace in Europe, stopping any one nation from becoming too powerful. Two military alliances emerged a few years before the war: ...

Many U.S. allies expected Trump’s second term as U.S. president to be disruptive after his stream of pronouncements on Ukraine, Europe and trade on the campaign trail.

Alliances provide collective goods; if joining forces helps a group of states deter or win a war, all its members benefit regardless of how much each contributed. As a result, the strongest members of ...