Battle rages between American forces and the Japanese in Manila during World War II

The video describes a military operation where soldiers face sharpshooters in open terrain, cross a river to attack the Japanese stronghold in Intramuros, and retrieve records from Southern Bank. The American flag is raised, and resistance is encountered at the legislative building, leading to a cautious advance.

What was the role of the 37th Infantry Division in the described military operation?

How did the troops advance towards the legislative building?