system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Did Loki's Army from the first Avengers movie have any chance of winning?

You know those Chitauri guys? Well let's assume for this scenario that the Avenger initiative is never put into place, the members do the team all fall in battle prior to the battle of New York. Could the Chitauri actually have conquered Earth?

I find it hard to believe they could have. But what are your thoughts. Sorry if this might be in the wrong subreddit or done before.
gpt
Pretty easily. The portal was staying open no matter what the Avengers threw at it, and the military was struggling to mobilize enough forces, and what they did have was very outgunned. The aliens actually had the Avengers on the ropes anyway and it was just Iron Man launching the nuke into the mothership that saved the day. With the portal open the military wouldn't have been able to stop the invasion.