When Thanos’ army attacked Wakanda seeking the Mind Stone, Rhodey suited up in his War Machine armor and used his heavy artillery to offer air support for his comrades on the ground, alongside Falcon. The battle had turned in the heroes’ favor, following the arrival of Thor, Groot, and Rocket. But, when Thanos himself arrived, things quickly changed. Attempting to attack Thanos, War Machine could do nothing as the Titan used his Infinity Stones to warp his armor, nearly crushing him inside.
When Thanos got ahold of the Mind Stone, he used the combined power of the Infinity Stones to snap his fingers, wiping out half of the life in the universe. Searching for Falcon in the aftermath of the chaotic battle, Rhodey didn’t see his teammate disintegrate, even as their allies all across the battlefield similarly vanished into nothingness. Rhodes was incredulous as he joined the equally stunned and mournful Bruce Banner, Black Widow, Thor, Rocket and Captain America, wondering what had happened to their friends and allies.
After the Snap, Rhodes retreated to the Avengers compound with the remaining Avengers and eventually met Carol Danvers, AKA Captain Marvel, who arrived and offered to help recover the Stones from Thanos and reverse the Snap. In trying to do so, however, the team discovered Thanos had used them one last time to destroy the Stones. Thor, consumed with anger, kills Thanos and the heroes once again are at a loss of what to do next.
Five years later, Rhodes spends most of his time tracking down Barton who had gone rogue slaughtering criminals across the world and reported his findings back to Black Widow. He resisted the assignment after seeing the aftermath, but Black Widow pushed him to keep looking. Meanwhile, a sliver of hope arrived in the form of Scott Lang, AKA Ant-Man, who had been lost in the Quantum Realm. He explained how they could use it to travel back in time using a Quantum Tunnel, with Stark’s assistance in navigating it, and retrieve the Stones to bring everyone back. Rhodes then finally located Hawkeye, and Black Widow convinced the rogue Avenger to return to the Avengers compound now that they had a new way to fix the universe.
Rhodes assisted in the time travel test runs alongside Hulk, Ant-Man, and Hawkeye. After arguing with Banner to use time travel to kill a younger Thanos, the team continued the test, outfitting Hawkeye in a time travel suit that materialized over clothing and armor. After a successful trial where Hawkeye traveled to the past and brought back an object, the Avengers reconvened to track down all the Infinity Stones across time. After determining each Stone’s respective location in time, Rhodes traveled back to 2014 to the planet Morag with Nebula, Hawkeye, and Black Widow. Wishing the latter pair well on their quest for the Soul Stone, he stayed on Morag with Nebula to snatch up the Power Stone before Peter Quill, AKA Star-Lord, retrieved it. After seeing Star-Lord dancing on the planet and realizing he was an idiot, Rhodes knocked him out and the pair successfully acquired the Power Stone. Rhodes related to Nebula over her emotional suffering and augmentations, having been previously paralyzed and needing technology to help him walk. Upon returning to their present time, Rhodes and the rest of the Avengers were unaware that Nebula from 2014 had returned in place of their Nebula.
After the Stones were united in a gauntlet created by Stark, Hulk snapped everyone back into existence across the cosmos. Immediately following their triumph, the past version of Nebula brought Thanos and his army forward to present day using the Avengers’ Quantum Tunnel, who then destroyed the Avengers compound, separating the heroes. Supporting massive amounts of debris that was also preventing a flood, Hulk insisted that Rhodes and Rocket escape. Thankfully, Rhodes was able to free himself from his somewhat damaged armor to help Rocket, who was being crushed by rubble himself. Ant-Man heard Rhodes’ call for help, liberating the trio from the fallen headquarters, and they joined the rest of the Avengers, including those who had just Blipped back, fight Thanos’ army. While this second battle resulted in another Snap by Stark, wiping Thanos and his army from existence, it also resulted in Stark’s death. Before Stark perished, Rhodes comforted his best friend one last time and later attended his funeral, comforting friend and ally, Happy Hogan.