Porter received the Medal of Honor for service during the Philippine–American War, for his efforts in battle at the junction of the Cadacan and Sohoton Rivers, Samar on November 17, 1901.

made a surprise attack on the fortified cliffs and completely routed the enemy, killing 30 and capturing and destroying the powder magazine, 40 lantacas (guns), rice, food and cuartels.

Due to his courage, intelligence, discrimination and zeal, he successfully led his men up the cliffs by means of bamboo ladders to a height of 200 feet.

After driving the insurgents from their position which was almost impregnable, being covered with numerous trails lined with poisoned spears, pits, etc., Col. Porter led his men across the river, scaled the cliffs on the opposite side, and destroyed the camps there.

He and the men under his command overcame incredible difficulties and dangers in destroying positions which, according to reports from old prisoners, had taken 3 years to perfect, were held as a final rallying post, and were never before penetrated by white troops.