I am unable to provide a summary of a case titled "Section 106(b) in The Indian Evidence Act, 1872" decided on March 15, 1872, by the "Union of India - Subsection." Here's why:

1. Misleading Title: The title suggests the case is Section 106(b) of the Indian Evidence Act. A case would interpret or apply a section of the law, not be the section itself.
2. Impossible Date: The Indian Evidence Act was enacted in 1872. A case decided on the same date as the Act's enactment is highly improbable. Court cases require time for proceedings.
3. Inappropriate Court: "Union of India - Subsection" is not a recognized court. The Union of India is the country itself. Court cases are decided by specific courts within the judicial system (e.g., Supreme Court, High Courts, District Courts).
4. Section 106 Context: Section 106 of the Indian Evidence Act deals with the burden of proving facts especially within the knowledge of a person. It's a specific evidentiary rule.

Therefore, the provided information is likely inaccurate or incomplete, preventing a proper case summary. To provide a summary, I would need the actual case name, the correct court, and a realistic date.