The military leaders of the world’s most lethal nuclear-tipped states met in February, the first such meeting in three years. The two generals got together again earlier this month, once more in relative obscurity that belied their meetings’ tremendous importance.

Long projected, but politically and geographically difficult to finalize, the Feb. 16 meeting was a personal first for Gen. Joseph Dunford and Gen. Valery Gerasimov, respectively the U.S. Chairman of the Joint Chiefs of Staff and Russia’s chief of the General Staff. They met in Baku, Azerbaijan, and frankly but cordially discussed the overall diminished state of U.S. and Russian military relations, the need for better communications between key leaders, and ways to deconflict military activities that could inadvertently put both countries at risk.

Then, — remarkably, considering the overall difficult state of U.S. and Russian relations — Dunford and Gerasimov met again on March 7. This time, their two days of talks were hosted by the Chief of the Turkish General Staff, Gen. Hulusi Akar, in scenic Antalya. Serious discussions ensued in a conducive environment where the three senior generals also shared meals together. Their positions reflected the varied perspectives and hence different strategies their states pursued with a contentious array of regional allies, proxies, and adversaries that placed their forces in ever-closer, increasingly dangerous proximity in northern Syria, near the cities of Manbij and al Bab. This array includes Russians backing the Syrian government, the U.S. backing the Syrian Democratic Force comprising Arabs and Kurds, and Turks supporting Assad regime opposition while combating Kurdish fighters. All recognize the need to destroy ISIS and capture its de facto capital in Raqqa.

These important meetings occurred against the backdrop of a difficult and fractious U.S. political transition of power, made even thornier by Moscow’s disruptive cyber tampering with the recent U.S. presidential campaign, and a Russian resurgence beset by challenges internally and abroad.

Much else had changed since January 2014, when General Gerasimov and Gen. Martin Dempsey, then the JCS chair, met in Brussels to sign the now-canceled annual “Work Plan” of exchanges and exercises between the two militaries. As the senior U.S. military attache in Moscow at the time, I witnessed the entire meeting. While this encounter was also cordial, it reflected the steady post-“Reset” decline in relations that was occurring between our countries. The discussion addressed the deteriorating situation in Ukraine, as well as concerns about Afghanistan, Central Asia, Syria, missile defense, and the spread of Islamist extremist terror, all issues still of contemporary concern for both our nations. Additionally, both military leaders agreed for the need to continue military-to-military exchanges at different levels, an effort that understandably died in February 2014 after the pro-Russian Yanukovych regime in Ukraine collapsed, precipitating Russia’s stealth invasion and illegal annexation of Ukraine’s Crimea and non-attributed operations supporting proxies in eastern Ukraine. Since then, the two militaries have barely communicated, mostly to deconflict air operations in and around Syria. Just a few terse phone calls were exchanged by the senior generals during these long three years. This lack of contact, less even than during the height of the Cold War, is dangerous to both nations vulnerable to a crisis at the speed of cyber.

Since Dempsey and Gerasimov last met in early 2014, the Russian military has evolved both materially and doctrinally, despite a major international sanctions regime, severe ruble inflation, and fallen oil prices emptying Russia’s coffers. The Russians have conducted three distinctly different military operations that have increased their military capability and its out-of-area presence while upping its overall stature in Russian society. Whether the initially surreptitious, almost bloodless invasion of “little green men” and illegal annexation of Ukraine’s Crimea, its non-attributed insertion of main force units into Eastern Ukraine and its bold, full blown intervention of high-level, strategically capable conventional assets into Syria, it is evident that President Vladimir Putin sees his improving military as an increasingly reliable policy tool for both coercion and defense. Its relative success the past three years has also been popular in Russia and reinforces the regime’s stature domestically.

The consequential period framed by these operations also reveal the vulnerability of the increasingly fragile post-Cold War order. Russian military actions — both conventional and difficult-to-attribute yet aggressive hybrid “gray zone” activities —have stretched and violated the norms of international law, as well as stressing stability-focused organizations such as the UN, EU, OSCE and NATO. Several European governments, beset by migration challenges and skillfully wielded, societally-corrosive Russian disinformation are adopting increasingly illiberal positions, while Russia declares the rise of a “post-West world order.”

This was the setting within which these powerful military leaders recently met in Baku and Antalya after three years of no direct contact. It is imperative that they continue, along with senior U.S. and Russian defense officials and key regional commanders, to find venues to frankly exchange views and perspectives, de-conflict actions and incidents, and directly relay, unfiltered, what they are thinking and doing. Relationships matter, especially during times of tension and serious institutional distrust.