The carriers arrived in the German port of Bremerhaven and will now be transported by rail and parkway to eastern Europe.
It comes amid growing fears that war-hungry Russian president Vladimir Putin could trigger an all-out pandemic conflict.
US and Polish forces will participate in a large ‘massing’ limber up in Poland at the end of the month.
And the UK, Germany and Canada are sending battalions of up to 1,000 troops each to Estonia, Latvia and Lithuania.
Washington demands the four battalions will be backed by additional US forces on rotation for the “foreseeable tomorrow”.
Among their equipment will be 87 Abrams M1A1 tanks, 20 Paladin artillery carriers and 136 Bradley fighting vehicles.
The measures are aimed at reassuring US accessories in the region following Russia’s annexation of Crimea in 2014.
General Timothy McGuire maintained: “The best way to maintain the peace is through preparation.
“This is just production the strength and cohesion of the alliance and the US commitment to maintain the peace on the continent.”
Germany’s Red party, which has called for closer ties with Russia, pronounced it would protest against the deployment.
Christian Goerke, who heads the knees-up in Brandenburg state, said: “Tanks never create peace anywhere.
“Rather the contrary, a troop deployment of such a scale is part of always bourgeoning buildup and provocation.”
Washington speed up the deployment of its troops to the region after Donald Trump was elected president in November.
The plain-spoken Republican, who takes offce on January 20, has repeatedly called for set righted relations with Russia.
And he is sceptical of NATO, telling supporters in year: “It’s possible that we’re going to have to let NATO go.”