"...two armies smashed into one another about five kilometers north of Lebanon on the morning of May 2nd; this was the first time in over ten months that either side, with the exception of the action west of the Tennessee River, had genuinely fought a battle of maneuver, and the advantage flowed overwhelmingly to Lenihan and his forces. "With the river to our backs," he noted after the war, "there could be no retreat. We would have Lebanon, or we would be prisoners." By the evening the next day, Lenihan had, albeit with staggering casualties compared to his previously successful campaigns, seized Lebanon and her environs, and even more importantly the railroads passing east out of it through rural Wilson County towards Knoxville were in Yankee hands. Nashville had now been choked off from the east.
The next domino to fall came on the 5th, as the defenses of the Highland Rim around Ridgetop and Ashland City collapsed, with trenches overrun and foxholes and pillboxes cleared by flamethrower-toting "fireteams." Hundreds of American soldiers were killed as they stepped on landmines, but the press down along the Cumberland River and towards Nashville from north and north-west was unstoppable now as the thinned numbers of defenders were unable to sustain themselves against the tactical push to take advantage of Lenihan's breakthrough further east. At sunset on the 5th of May, [1] from atop a dusty ridgeline, General Farnsworth saw his prize that had eluded him for ten long, brutal, exhausting and dismaying months in the basin below him, barely visible through the smoke and ash - what remained of the city of Nashville, and his men marching towards it. In his diaries, he compared it to Moses seeing the Promised Land; he wept profusely and remarked that he could retire and die having secured his mission "at the death knell" of his impending replacement by Pershing, and indeed Farnsworth would tender his resignation shortly upon being relieved, too spent and emotionally broken by the hell of his command, and spent the rest of his life quietly as a military instructor and then civic leader..."
- Bleeding Heartland: The Midlands Front of the Great American War
"...the breaching of the Inner Line from three sides broke the spirits of the city's defenders, already thinned out to push the Yankee back across the Cumberland by Lebanon. Long's men were each handed a pistol and told that they were no longer supply escorts but city defenders; long after the war, Long estimated that all of two, not including himself, of his small platoon survived the hell that was the infamous "Seven Days" of Nashville.
The city had been badly damaged by long-distance artillery and aerial raids over the last ten months but even in early May was something resembling what had once been a city; after the Seven Days, it would be little but blackened rubble. The approaching Yankees announced their arrival with rolling artillery that now in closer proximity to the city shattered everything in their path; they were supported by death from the sky, with planes strafing Confederate lines and dropping small incendiary bombs. The worst came on the 7th, when the Yankee forces stopped at the northern outskirts of the city to wait; suddenly, gas canisters rained all over Nashville, clouds of white fumes rising up over the rubble and snaking through doorways and around corners to make eyes water and lungs burn. Despite months of fears over a gas attack, the defenders still did not have sufficient gas masks, and that was a big part of how Long was in the end captured. Caught in the midst of a bad cloud, he collapsed convinced he would die and seeing visions of Rose through the chaos; that he survived, albeit with a bad cough for the rest of his life, he took as a sign from Providence that he was meant for something greater. As the gas cleared, the Yankees pushed into the city, fighting building to building, sometimes even room to room and hand to hand. Long was discovered by a young lieutenant leaned against a wall, abandoned by his comrades, still nearly coughing up a lung, and he claimed that he survived only because his pistol was lying several feet from him rather than in his hand..."
- Every Man a Kingfish: The Life and Rise to Power of Huey Long
"...Buck's order to retreat towards Murfreesboro and beyond before Lenihan could cut off the routes of retreat to the city's southeast; the American army turned west anyways to march into the city and seize it. After seven long days of brutal urban warfare in which thousands of Confederate defenders were slaughtered and mere hundreds - including future President of the Confederate States Huey Long - taken prisoner, the city was in American hands, though what remained of Nashville could barely be called a city. After ten months, the campaign for Nashville was over. The Inner Line had failed, the city destroyed, and the Army of Tennessee broken..."
- Making Sense of the Senseless: The Great American War at 100
[1] Subtlety, what is it?