Attack on the New Avengers Facility

The Attack on the New Avengers Facility featured Thanos, with his mothership Sanctuary II, obliterating the New Avengers Facility in New York.

Background
After the Avengers successfully regained the Infinity Stones from alternate timelines, Tony Stark had finished developing his own Infinity Gauntlet. Stark gave the duty to use his Gauntlet to bring back everyone who had been decimated by Thanos to Bruce Banner. Meanwhile, Nebula, who came from the past, sabotaged the Avengers' time travel device in order to bring Thanos and his armies to the present.

Attack
Once Bruce Banner reversed the Decimation by snapping, Thanos and his armies had appeared outside of the New Avengers Facility and destroyed the building. Thanos deployed the Outriders to hunt down the Infinity Gauntlet, which was in Hawkeye's possession.

Aftermath
"You know it's a trap, right? "Yeah. And I don't much care." "Good. Just as long we are all in agreement... Let's kill him properly this time."

- Iron Man and Thor

After the facility was destroyed, Tony Stark, Captain America, and Thor rallied themselves and confronted Thanos. After being beaten by Thanos, portals created by Doctor Strange began to open up behind them. This would lead directly into the Battle of Earth.