After a yearslong debate over NATO spending, European nations are poised to commit more funds to deter Russia. Now the region must decide how to unify its fragmented manufacturing.

After a yearslong debate over NATO spending, European nations are poised to commit more funds to deter Russia. Now the region must decide how to unify its fragmented manufacturing.

The increase was announced hours before a NATO meeting during which member countries are expected to agree to raise military spending to 5 percent of their G.D.P.