What would happen if both sides were given one Super Tank at war start?

To start this is NOT a suggestion, just something I've been thinking about at work today.

Let's pretend a brand new war starts under perfectly normal conditions, however each side is given 1 super tank of their factions version. Let's assume it's given to a regiment or group that knows what they are doing and not going to get it killed immediately in a stupid rush.

What do you think happens? Does it have a huge effect? Does it die to mammography rushes early and then it's back to normal for the war?

Anyway let me know what you all think!