From Military History: Past to Present, by Vance Holbrook:
2040, July 18-28. Battle of Syracuse. Following the combined ICBM-ASBM/THOR-Air Force destruction of the GD Atlantic Fleet, Mansfeld cast the dice of fate on an all-or-nothing assault upon Syracuse. Phase I of the assault promised the greatest rewards. The defenders, however, had just sufficient numbers and several Heidegger jamming companies to blunt any breakthrough from occurring. Phase II saw a steady increase of forces on both sides as Kaisers from the Niagara Peninsula joined the assaults. The ensuing battle brought about a heavier loss on the GD attackers. Phase III amounted to GD desperation and the last, offensive hurrah of the Expeditionary Force.
2040, July 28-August 7. The Grind. The end of the GD attack on Syracuse signaled a steady but remorseless trading of places between attacker and defender. The GD forces were spread out over a large area of inhospitable terrain. Their inability to close the ring on US First Front now told against them as numbers and materiel built up heavily against the Expeditionary Force.
In Southwestern Ontario, the massed artillery devoured GD soldiery. In New York State, the GD could not retreat from Buffalo without risking cutting off Twelfth Army, while a retreating Twelfth Army would have risked running the gauntlet of Interstate 90. In the north, the Fromm Offensive ground to a halt as GD engineers began to prepare a defense in depth of Quebec. Reinforcements from Europe failed to match the wastage of the continuing campaign.
On the American side, newly trained levies entered the services, swelling their ranks. The reinforced army groups in northern New York, Vermont and New Hampshire indicated the direction of American strategic thinking. The removal of 70 percent of the Heidegger battalions from Ontario and their placement at the northern US front against Quebec heralded the coming attack.
2040, August 7-17. The Alan Offensive. General Alan—the Chairman of the Joint Chiefs of Staff—remained in field command. He switched from Syracuse to the newly combined Army Group North (formerly Army Group New York and Army Group New England). On August 7, a hurricane bombardment signaled the beginning of the decisive Quebec assault…
From Tank Wars, by B.K. Laumer III:
The action-reaction of new technology is an interesting phenomenon in modern war. Side A develops a new weapon and introduces it onto the battlefield. If the new weapon has a devastating effect, side B quickly searches for a countermeasure. Once it finds the counter, it is employed as quickly as possible. This in turn often induces side A to find a counter to the counter.
At times, the first countermeasure so effectively disrupts the new weapon system that it leaves the first side at a great disadvantage, having invested so much in a now-useless technology.
World War II provides countless examples of this. The war in North America also had many interesting instances. One of the more intriguing was the extraordinary reliance of the German Dominion on ground drones and AI-run tanks. The Heidegger jammers were the counter to them, rendering them, if not useless, then no more effective than a similar force of standard type. During the latter phases of the 2040 campaign in Quebec, saw one of the most potent turnarounds in the history of war.