Bataan and Corregidor Attack

The Japanese army goes to capture the Philippines, which is under the control of the United States. Judging the results of the Japanese army, General MacArthur abandoned the Philippines as a defenseless city. He escapes to the Bataan Peninsula and launches a strategy to besiege. He withdrew to Corregidor Island on the Bataan Peninsula to await American support from the mainland. Do you see the withdrawal of American forces as a strategic retreat or as a rout? How to judge and decide What is true victory on the battlefield?