Please help, need to explain what these words mean, and answer the question in the photo

PH

July: Japan invades North China from Manchuria.

1940.

July: U.S. imposes trade sanctions, followed by an embargo, aimed at curbing Japan's military aggression in Asia.

1941.

January: Adm. Yamamoto begins communicating with other Japanese officers about a possible attack on Pearl Harbor.

BOM

At 6:30 AM, Japanese planes hit Midway.

At 7:00 AM, the American carriers launch.

At 7:15 AM, Japanese planes begin changing weapons.

At 9:20 AM, American torpedo bombers attack the Soryu.

BOTB

Hitler's aim was to split the Allies in their drive toward Germany. ... As the Germans drove into the Ardennes, the Allied line took on the appearance of a large bulge, giving rise to the battle's name. The battle proved to be the costliest ever fought by the U.S. Army, which suffered over 100,000 casualties.

THTA

The Tuskegee Airmen were the first African American soldiers to successfully complete their training and enter the Army Air Corps (Army Air Forces). ... Acceptance from Army Air Forces units came slowly, but their courageous and, in many cases, heroic performance earned them increased combat opportunities and respect.

TJ

15-16 February - V Amphibious Corps landing force departs the Marianas for Iwo Jima

7 April - In first flights of the U.S. land based fighter aircraft over Japan, 80 P-51's from Iwo Jima escort B-29's on bombing mission

18 April - The last U.S. Marines leave Iwo Jima

answer; u.s senate;