The Horde starts with at least three times as many troops as Stormwind during the First War, so pulling a victory out of your ass as the humans is less about tactical genius and more about holding out long enough to form The Alliance and getting enough people join it AND having them agreeing to join the war AND having them send enough troops down to your corner of the map before the orcs finish running train on you. Or, you know, cheating.
However, if you play as a vassal of Stormwind, when your liege gets his cheeks clapped, you break off and form your own kingdom. Granted, you're a dead man the second the truce and knee-jerk defensive pact against the Horde ends, but at least you get to watch the orcs burn Goldshire to the ground.
Having found myself in that situation, I decided to go full ham and shoot for an
immoral victory. I took the seduction focus and proceeded to sleep with the wife of Every. Single. One of the Horde's leaders. Cho'gall the two-headed ogre got it particularly bad, because I seduced his second wife after he divorced(or maybe killed, didn't check) the first for unfaithulness, which is to say I seduced her. Warchief Blackhand 'the cuckold' took it the worst, however, as he challenged me to a duel after finding out what I did. He lost, and also died due to the fact I had two legs and he had one.
Dominance asserted.