What Union General marched 35000 troops into Virginia near Mass juction?

The Union General who marched 35,000 troops into Virginia near Mass Junction was General Joseph Hooker. This maneuver was part of the larger operations during the Civil War, particularly leading up to the Battle of Chancellorsville in May 1863. Hooker's forces aimed to engage Confederate troops and gain a strategic advantage in the region. However, his campaign ultimately faced significant challenges and setbacks.