Based on lessons learned in Ukraine, the US Army has announced that it's abandoning its current modernization program for its M1A2 Abrams main battle tank in favor of a more fundamentally upgraded version called the M1E3.
M1A2 SEP - War Thunder Wiki
Allison Transmission Secures US Army Abrams Tank Modernization Contract
Why Can't Tanks be Larger? Rheinmetall's 130 mm Gun and the Future of MBTs
The Army Has Big Plans for a Light, Fast and Deadly Super Tank. Here's What We Know So Far.
US Army
History under the hammer as National Motorcycle Museum Collection
Ambitious project aims to create research base over 600 ft
A USMC veteran on the M1A1 Abrams tank: “This tank was designed for assault!” (7 - Page) ) - News - War Thunder
Ukrainian soldiers to receive extra training on US Abrams tanks in Germany
U.S. Army fast-tracks Abrams Main Battle Tank modernization
Heavy Armor Lives: Army May Operate M1 Abrams Tank Through 2050 - Warrior Maven: Center for Military Modernization
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Cold War US Prototypes Archives - Tank Encyclopedia
Timeline - US Army Ground Vehicle Systems Center