Short answers, pulled from the story.
The Battle of Mindanao was part of Operation VICTOR V, formally ordered on the 10th of March 1945. The main landings at Parang began on the 17th of April 1945, and organized Japanese resistance continued until mid-August 1945.
Lieutenant General Robert L. Eichelberger commanded the U.S. Eighth Army, which oversaw the Mindanao campaign. Ground operations were assigned to X Corps under Major General Franklin C. Sibert, with the 24th Infantry Division under Major General Roscoe B. Woodruff and the 31st Infantry Division under Major General Clarence A. Martin serving as the principal combat units.
Operation VICTOR V was the American plan to clear Mindanao of Japanese forces, ordered by General Douglas MacArthur on the 10th of March 1945. Instead of a frontal assault on the heavily defended Davao Gulf, the plan called for landing at the undefended Illana Bay on the western coast and driving more than 100 miles east to strike the Japanese from the rear.
After the Battle of Mindanao, some 22,250 Japanese troops and 11,900 civilians surrendered when the war ended. During the campaign, 12,865 Japanese were killed in battle and an estimated 8,235 died from starvation and disease. American losses totaled 820 killed and 2,880 wounded for the entire campaign.
Filipino guerrillas under Colonel Wendell Fertig provided intelligence about Japanese positions and landing beach conditions before the American landings, and fought alongside American units throughout the campaign. Their early capture of Malabang and its airstrip allowed Allied planners to adjust the landing site and accelerate the operation. The Eighth Army described their contribution as a "force multiplier."
Private First Class James Diamond of D Company, 21st Infantry Regiment, 24th Infantry Division, was awarded a posthumous Medal of Honor for his actions on the 14th of May 1945 near Libby Airdrome. Diamond drew enemy fire by sprinting to an abandoned machinegun, sacrificing his life to allow his patrol to evacuate casualties safely.