[PAR] [TLE] First United States Army [SEP] The First Army is the oldest and longest established field army of the United States Army, having seen service in both World War I and World War II, under some of the most famous and distinguished officers of the U.S. Army.  It now serves as a mobilization, readiness and training command. [PAR] [TLE] 72nd Field Artillery Brigade (United States) [SEP] The 72nd Field Artillery Brigade is an AC/RC unit based at Joint Base McGuire-Dix-Lakehurst, New Jersey.  The unit is responsible for training selected United States Army Reserve and National Guard units along the East coast.  The brigade is a subordinate unit of First Army Division East, First United States Army.
[PAR] [TLE] First United States Army [ SEP ] The First Army is the oldest and longest established field army of the United States Army , having seen service in both World War I and World War II , under some of the most famous and distinguished officers of the U.S. Army . It now serves as a mobilization , readiness and training command . [PAR] [TLE] 72nd Field Artillery Brigade ( United States ) [ SEP ] The 72nd Field Artillery Brigade is an AC / RC unit based at Joint Base McGuire - Dix - Lakehurst , New Jersey . The unit is responsible for training selected United States Army Reserve and National Guard units along the East coast . The brigade is a subordinate unit of First Army Division East , First United States Army .
Is the 72nd field brigade part of the oldest or newest established field army?
Is the 72nd field brigade part of the oldest or newest established field army ?
the oldest
the oldest