In December of 1941, the Japanese attack Pearl Harbor.  Covering the new in Washington, Lawrence is caught up in the patriotic fervor of the American super-hero community and joins several heroes charged by the President to go to the West Coast to fend off a potential attack on the U.S. Mainland.  There they discovered the real threat was the time-traveling criminal Per Degaton.  Converging with the Justice Society on Hawaii, the assembled heroes managed to defeat Degaton and return him to his proper time.  Afterwards, the larger group of heroes formed the wartime All-Star Squadron to defend America against threats both within and without (All-Star Squadron #1-3).  Liberty Belle was a major member of the All-Star Squadron, assembling and chairing its first full roster meeting (All-Star Squadron #31).  In the summer of 1942, Baron Blitzkrieg attacks Philadelphia and at the Liberty Belle, Tom Revere is killed (All-Star Squadron #45).  In the battle with the Baron, she is exposed to some of his equipment gaining the ability produce sound waves.  Mourning her father-figure, Liberty Belle abandons her costumed identity briefly but resumes it as the Crisis on Infinite Earths engulfs Earth-Two (Crisis on Infinite Earths LS),   Having had a long-running romance with speedster Johnny Quick (Johnny Chambers), they are married in a brief ceremony in Boston (All-Star Squadron #50).

As the Crisis subsided, the state of marriage between Lawrence and Chambers is unclear,  For the remainder of the war, Liberty Belle was internationally active as an counter-Axis agent.  Throughout her travels, she remained attached and romantically involved with Rick Cannon, whom she knew from her earliest days as a costumed adventurer.  She spent significant amounts of time in the Pacific battling Japanese forces (Star-Spangled Comics ##37,30-40,42-43,48,and 52-54), at one point even impersonating Japanese propagandist Tokyo Rose (Star-Spangled Comics #49).  As World War II drew to a close, Liberty Belle engaged in wrap-up operations feeding starving survivors in Japan (Star-Spangled Comics #55), recovering looted Chinese artifacts from Japanese agents (Star-Spangled Comics #56) and captured Nazi war fugitives (Star-Spangled Comics #58),  As she returned to the United States, she was no longer see in Cannon's company and his activities after the war (and whether he survived) are unknown. 

Liberty Belle's recorded post-war history is brief, with a few cases of routine crime and one costumed adversary, The Gong, in 1946 (Star-Spangled Comics #61).  In her last recorded case in the Spring of 1947, she thwart Slugger Wells and his gang from exploiting guest at a tourist resort with extensive caverns for boat touring (Star-Spangled Comics #68),  The later activities and ultimate fate of Liberty Belle on Earth-Two remains to be revealed.