(instead of 1M, about 10 to 20 enemies).
I can see it now
You walk into a war that was added as permanent content, and begin to pound enemies to a pulp. Having a grand old time you don't look at the progress bar until about 30-40 minutes later, having defeat near to 40 enemies. Glancing over you notice that the bar has made no progress, though it tells you your amount of kills below. So you decide to clear the cache and cookies, then restart the game. You arrive back at the war feeling pretty good that you had defeated the glitch/bug, and begin to pound away at the enemies, this time keeping better track of the kills that you are getting. Strangely enough the previous 40 kills that you had gotten still showed up underneath the Progress bar, though it was still stuck at 0%. So you decide to jump onto the Forums to see if this is a bug that everyone is getting.
Upon arriving at the forum thread for the release, you begin to notice a bunch of people commenting on the amount of enemies to kill. You ask around and come to find out that you have 1 MILLION enemies that have to be defeated to complete the war, not just that but unlike server wars this was all done by you and you alone. You rush to the gremlin thread to report the insane bug, and you see a staff post there. It states, "The 1 Million enemy war is not a bug." you then proceed to have your jaw drop as you calculate just how long it will take to kill that many enemies.
A little while later a design notes comes up saying that at the end of the War there is some awesome weapons and mechs, only available after defeating the boss after the 1 million enemies. These weapons also happen to be the strongest weapons ever released. The only issue is trying to get them. You slowly but surely sink into your chair, debating whether to spend the time involved in this feat, or to simply give up and wait for something else.
Finally admitting defeat you click close on your tab, shut your laptop, and walk down the hall.
And yes that is completely made up. Though a quest with like 500 or a thousand enemies would be fun. Only if they aren't repetitive and you are allowed to switch equipment between fights though.