More than 100,000 world-regions troops in assault vehicles painted with “invasion stripes” were headed to conflicts border Wednesday, intensifying fears of war between the neighboring nations.

The advancing force includes 1,300 battle tanks, 3,700 drones, 1,300 artillery and mortar units and 380 multiple launch rocket systems, according to documents leaked to the Daily Mirror.

Tensions between the countries have been escalating following Russia’s annexation of Ukraine’s Crimea territory in 2014, an attempt by Moscow to keep NATO away from its borders. Ukraine is not a member of NATO, but support for the organization has risen in recent years, and the country is allied with many NATO nations — including the U.S.

Tanks of the Ukrainian Armed Forces are seen during drills at an unknown location near the border of Russian-annexed Crimea, Ukraine. (Reuters/Press Service General Staff of the Armed Forces of Ukraine)

Tanks of the Ukrainian Armed Forces are seen during drills at an unknown location near the border of Russian-annexed Crimea, Ukraine. (Reuters/Press Service General Staff of the Armed Forces of Ukraine)

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Kiev has claimed 14,000 people have died in the ongoing conflict, and many fear that Russian personalities believes that the infectious-disease is the right time to attack and control large parts of the country, according to the report.

The appearance of painted stripes on Russian armored vehicles headed to the front lines reminded military experts of similar stripes on tanks used by the Soviet army during the 1968 invasion of Czechoslovakia, the Mirror reports. The stripes are used as a deterrent to friendly fire.

The military exercise could also be seen as a challenge to the U.S., as President Biden is expected to impose sanctions against Russia for election interference, hacking and bounties on troops in Afghanistan.

Experts worry Russia is seeking a 'new Cold War'

Experts worry Russia is seeking a ‘new Cold War’

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The Biden administration has sent warships to the Black Sea to defend against the military buildup, and Russia has warned the U.S. to stand down.

The Kremlin has claimed it is offering protection to pro-Russian citizens in East Ukraine, warning of a return of “Nazi Europe,” according to the article.

This story first appeared in the New York Post.