Brigadier General Albert J. Myer was removed from his position as Chief Signal Officer of the Union Army in 1863 mainly due to administrative and jurisdictional conflicts. The primary reason cited was his disagreement with Secretary of War Edwin M. Stanton. Myer had organized the Signal Corps and established its policies, but he clashed with Stanton over financial and administrative control. This dispute led to his removal.

Myer reportedly resisted Stanton's attempts to exert direct control over the Signal Corps' operations and resources, which included financial allocations and administrative decisions. The underlying friction and differing visions for how the Signal Corps should be run culminated in Stanton removing him from his post.

Later, in the reorganization of the Signal Corps in 1864, Myer was reinstated as Chief Signal Officer, reflecting his substantial contributions and expertise in the field.

For further reading, you can refer to sources such as "Signal Corps (United States Army)" on Wikipedia for more in-depth information about the historical context and Myer's role in the Signal Corps [source URL: https://en.wikipedia.org/wiki/Signal_Corps_(United_States_Army)].