What do tariffs, Mexico, Europe and the defense industry have in common?

President Trump tweeted Saturday that the U.S. and Mexico reached a deal to avert new tariffs. The Mexicans will send 6,000 troops to their southern border to slow migration from Central America.

The agreement bolsters the president's case for weaponizing tariffs.

And the strategy is likely headed to Europe, to the benefit of the U.S. defense sector.

Long before the 2016 presidential election, candidate Trump promised that if elected, he would make the Europeans pay their fair share for North American Treaty Alliance defense spending. He stepped up that rhetoric in May 2017, when he met with NATO country members in Brussels.

The president's assertion, although rough around the edges, is basically true.

NATO defense ministers set a guideline in 2006 for member countries to spend 2% of their gross domestic product on defense each year. The non-binding marker came at a time when the U.S. was spending heavily to fund the Iraq and Afghanistan wars.

When Russia annexed Crimea in 2014, NATO leaders gave the guideline more teeth. Heads of state were required to endorse an agreement to move toward the 2% goal by 2024.

Only 5 of the 28 member countries meet that goal today: the U.S., Greece, Britain, Estonia and Poland.

As with Mexico and border security, the President is likely to threaten the Europeans with new tariffs to get NATO countries to step up their defense spending.

It's a move that was foreshadowed in August 2018 when the President told supporters at a West Virginia rally that he would slap a 25% tax on every car that comes into the U.S. from the European Union.

The President believes tariffs are an effective weapon to force countries to succumb to his demands.

Managers in the aerospace and defense sector got the message long ago. They could see better times ahead and the obvious advantages of scale.

PriceWaterhouseCoopers, a leading global accounting and consulting firm, found mergers and acquisitions inside the sector reached $72 billion in 2017, besting the previous high set in 2015.

And on Sunday, United Technologies (UTX - Get Report) and Raytheon (RTN - Get Report)  announced they would merge in a blockbuster deal that would refocus the companies on aerospace.

Teaming with Raytheon should be a boon for UTX shareholders. Bringing its Pratt & Whitney jet engine business to Raytheon -- a partner in the F-35 combat jet project and a missile and avionics maker -- is a natural fit with plenty of synergies.

It's also the type of project that would ultimately benefit if the White House manages to get NATO countries to increase defense spending.

Lockheed Martin (LMT - Get Report) is another way for investors to get ready.

In addition to its lead position in F-35, the Maryland company is at the vanguard of 3D printing, big data, space engineering and other technologies important to NATO allies.

As the world marvels at tiny satellites and reusable, autonomous rockets, Lockheed engineers are busy focusing beyond boosters. They want to put a satellite factory in space. And it's not as far-fetched as it seems.

Lockheed 3D printed parts in 2016 for Nasa's Juno Jupiter orbiter. Two years later, another satellite commissioned by the U.S. Air Force was designed and built using a 3D printing technique called Laser Powder Bed Fusion.

A bed of aluminum powder is laid precisely into place by a robotic arm. A laser guided by a digital file then melts the powder to form the custom part. The process reduces production cycles, and costs.

3D printing satellites in space would negate the need for expensive rocket launches.

It's the same ingenuity Lockheed engineers are using to tackle cybersecurity. For decades they have been collecting, analyzing and using data to catch state-sponsored hackers. In the new digital era, this skill is more in demand than ever.

Meanwhile, its defense business remains robust. The company was awarded a $1.8 billion contract by the U.S. Air Force June 7, for the development of the Lightning II, a variation of the F-35 fighter jet.

Sales shot 7.6% higher in 2018, to a record $53.7 billion. Profits ballooned 167% to $5 billion. The 5 year average for return on invested capital is a staggering 31%.

Lockheed shares have been on fire this year, rising 35.7%, and were up 0.8% to $355.23 in pre-market trading on Monday. The strength has moved the stock to 14.3x forward earnings, and 1.7x sales. The market capitalization is now $100 billion.

While this is strong, the best is yet to come, especially if the administration continues to push NATO countries to increase defense spending.

Investors should use consider using any weakness in the months ahead to add new long-term positions. Based on sales growth and internal momentum alone, shares could trade to $500 in two years, representing a return of 40% from current levels.

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To learn more about Jon Markman's stock picks at the crossroads of culture and technology, check out his daily investment newsletter Strategic Advantage. To learn about Markman's practical research in the short-term timing of market indexes and commodities, check out his daily newsletter Invariant Futures.

The author of this column owns shares of Lockheed Martin.