LONDON — Brexit, Britain’s exit from the European Union, is getting so tiresome, you wish the Brits would get on with it and get out.

That’s a lot easier said than done. Britain’s conservative prime minister, Boris Johnson, would love to do just that, but he’s just lost a critical test in parliament. By a fairly narrow margin, 322 to 306, Britain’s legislators decided they first had to agree on how to carry out all the endless intricacies of Brexit before approving an agreement brokered by Johnson and the EU, whose 27 other member nations are not happy about Britain deserting their common cause.

Johnson still insists on pulling out by the end of the month rather than go begging for another extension, but he may not be able to block a three-month reprieve on British withdrawal. The impasse revolves, most critically, around trade across the line between the largely Catholic Irish Republic, a stalwart EU member, and the majority Protestant Northern Ireland, part of the United Kingdom, whose parliamentary delegation opposes anything like a compromise porous border. with the Irish Republic.

It’s tough to figure out exactly what’s going on here, but basically the Brexit crowd, led by Johnson, don’t want the other Europeans telling them what to do. They would rather not have to let people from those other countries into Britain in competition with true Brits, and they hate to be subject to verdicts from a European court.

That leaves the question of what about tariffs if Britain bowed out of a union set up essentially to facilitate free trade among members. Tensions between Irish Catholics and Protestants could flare anew if a wall were set up between the Irish Republic and Northern Ireland. As of now, goods flow back and forth between them unimpeded by hassles over customs and tariffs as they cross the line.

The debate over Brexit reminds one of all the quibbling between North and South Korea. Sides remain hopelessly opposed to one another and the rhetoric goes on with no real solution in sight. The overwhelming difference, of course, is that long-range missiles are not poised to open fire across the English channel, and no one’s talking about affixing fearsome weapons with nuclear warheads.

That’s not to say, however, that military issues do not hover beneath the surface of all the talk about a compromise on trade and travel. There’s planning for a “European army,” a force that would complement NATO, the North Atlantic Treaty Organization. Led mostly by the U.S., NATO arose to face the rising threat of the Soviet Union under Joseph Stalin and remains a counter, in theory, to the aggressive aims of Russia under President Vladimir Putin.

Nearly three-quarters of a century after the U.S., Britain, Canada and assorted allies drove the Germans out of France, Germany and France appear as advocates of a European army. The Soviet Union, which suffered by far the greatest loss of life of any of the World War II protagonists, defeated the Germans in eastern Europe after Adolf Hitler and his long-time lover, and short-time bride, Eva Braun, committed suicide in a bunker beneath the Germany chancellery.

Ironies abound. Could Germany, again the dominant country in Europe, rise again as a military power in the context of the EU? And would the French, Germany’s historic enemy, cooperate for long in any European force? Cynics say the Germans may now be the ultimate victors in Europe even if they were forced into unconditional surrender in 1945.

One asks, theoretically, if this force, in some unforeseen confrontation, could gang up against the British while the Americans dithered, not doing what side to favor?

Any number of scenarios, immediate or long-range, make for speculation. You hear a lot about “disaster” looming if Brexit happens without a deal on trade. A “No Deal Brexit” arouses fears of financial failure, of acrimony between the Brits and everyone else, including the Irish and the Scots, who also oppose Brexit and talk of Scotland gaining independence from the United Kingdom.

Then again, there’s the view that nothing much would change once everyone got over the inconvenience of delays at customs and immigration. Brexiteers say with happy grins that Britain would not have pay the $9 billion or so a year that it’s obligated to give the EU. As of now, the Brits owe $33 billion, which they might well avoid post-Brexit.

Amid all the yakking, it’s still possible that Brexit won’t happen. Maybe the anti-Brexit majority in parliament will have its way and force another referendum, which they believe would result in defeat of withdrawal from the EU. Perhaps Johnson’s enemies will bring about his downfall nearly three years after 51.9 percent voted for Brexit in a referendum called by David Cameron, then prime minister.

The reason for the EU in the first place was to bring together historic foes for the common good, but the legacy of hostility lingers on – even if no one so far is threatening to open fire.

The reason for the EU in the first place was to bring together historic foes for the common good, but the legacy of hostility lingers on – even if no one so far is threatening to open fire.