The scouts were right, the Kingdom of Man do atest the forests and launch an attack against the High Elves. For that, they make battle for war.
There, the Humans were already burning down the forests as they assume they'd been set up with traps and ambushes. For they know the High Elven Tactics and Strategy. They like to ambush, when no ground allows for their enemies to counter. For which, they ambush still.
Then secondary scouts arrive. Saying: "Oh Great King, the enemies have known of the ambush and have burned the forests".
Felinor: Asks all the Priestess' and the Priests that it shall be that the spirits make magic that will shroud the sky in rainfall till nightfall! We wait here till their advance!
The King of the Humans, King Terridon have seen light of the elves magic causing him to assume that they are prepared. In that, he said to his men to advance at rainfall.
But the men, noticing how murky the waters was suggested otherwise. So he told his men to remove everything that makes them heavy back to camp and move in lightly and swiftly in a murky soil. No gun works when wet so the men with muskeets replaced theirs with magic guns. Which were more expensive with their expensive crystals but works well in the rain than the muskeets.
The next thing they did was in planning how to advance in the field of battle. The soils were murky so the men just used held their guns at their waists by a string attachment to the gun and climbed trees for positions. They were setting up battle fronts against the elves, the only thing missing now is how they will entice and bait the elves.
But the High Elves, knowing the spirits of the forests were knowledgeable, were in turn speaking to them. Giving out the position of the humans. Then the fight begun by the hunt. By then, it was a firefight and archery fight between two forces, forcing the elves to move swiftly from tree to tree, position to position. Numbering the enemies three-to-one. In a fight to gain them the upper hand.
Then there shows to the Kings that the High Elves were prepared. So King Terridon issued in a next approach to the Elves. They set up traps and counter measures to hide and kill the enemy. Bait them with marginal attacks by Trebuchets and other forms of catapults.
The Humans under the Guise of camouflages will hide in the side and capture elves that were noticeable in their moves. From there, attack them with knives in the cover of their hiding.
The fight was long and cold, wet are the forces but still fought at night. It was finally night for the High Elves. Whose keen to spirit uses them to see in the dark. Having authority with spirits, they let out their ravage attacks by moving from traps, and moving in trees to trees, position to position and advances in mass numbers as to ramparage on the forces in the threes. Then, at The Human camp, fired with good accuracy each and any enemy.
To King Terridon, it was an unfateful conclusion to the battle. As the camp was overrun with arrows and spirit magic arrows that concluded much of the war to their retreat. Many a bounty was gained from them with some casualties of the war, but more so to the humans. Then the Nobles of the High Elves no longer believes that peace is possible, and King Felinor avoided the struggle of being enslaved, kept captive, and raped in the hands of the humans. No longer shall they seek pity, but rather vengence. They now range their attacks against the World. Planning, and thinking on how to take advantage of the event. From there, gain advantages of war.