USA Lend-Lease to the Soviets in WWII:
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In total, the U.S. deliveries through Lend-Lease amounted to $11 billion in materials: over 400,000 jeeps and trucks; 12,000 armored vehicles (including 7,000 tanks, about 1,386[41] of which were M3 Lees and 4,102 M4 Shermans);[42] 11,400 aircraft (4,719 of which were Bell P-39 Airacobras)[43] and 1.75 million tons of food.[44]
Roughly 17.5 million tons of military equipment, vehicles, industrial supplies, and food were shipped from the Western Hemisphere to the USSR, 94% coming from the US. For comparison, a total of 22 million tons landed in Europe to supply American forces from January 1942 to May 1945. It has been estimated that American deliveries to the USSR through the Persian Corridor alone were sufficient, by US Army standards, to maintain sixty combat divisions in the line.[45][46]
The United States delivered to the Soviet Union from October 1, 1941 to May 31, 1945 the following: 427,284 trucks, 13,303 combat vehicles, 35,170 motorcycles, 2,328 ordnance service vehicles, 2,670,371 tons of petroleum products (gasoline and oil) or 57.8 percent of the High-octane aviation fuel,[24] 4,478,116 tons of foodstuffs (canned meats, sugar, flour, salt, etc.), 1,911 steam locomotives, 66 Diesel locomotives, 9,920 flat cars, 1,000 dump cars, 120 tank cars, and 35 heavy machinery cars. Provided ordnance goods (ammunition, artillery shells, mines, assorted explosives) amounted to 53 percent of total domestic production.[24] One item typical of many was a tire plant that was lifted bodily from the Ford Company’s River Rouge Plant and transferred to the USSR. The 1947 money value of the supplies and services amounted to about eleven billion dollars.[47]*
So yes, they drove into Germany with an impressive amount of artillery. On American trucks with American artillery shells.