What Is 115th

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Last updated: April 14, 2026

Quick Answer: The term '115th' typically refers to the ordinal number following 114th and preceding 116th, commonly used to denote positions, such as the 115th Congress of the United States, which convened from January 3, 2017, to January 3, 2019. It may also refer to the 115th Infantry Regiment of the U.S. Army or the 115th meridian, either east or west of Greenwich. In sports, it can denote the 115th edition of an annual event, such as the 115th Boston Marathon held in 2011. Additionally, '115th' is used in military designations, like the 115th Fighter Wing of the Wisconsin Air National Guard.

Key Facts

Overview

The term 115th is an ordinal number that denotes the position following the 114th and preceding the 116th in a sequence. It is widely used across various contexts such as government, military, geography, and annual events to mark specific iterations, units, or locations. As an ordinal, it helps identify precise placements in chronological, numerical, or hierarchical order, making it a crucial reference in historical, political, and organizational frameworks.

Historically, the use of ordinal numbers like the 115th became standardized in formal record-keeping during the medieval period, particularly in European monarchies and religious institutions. These systems evolved into modern administrative practices, where legislative bodies, military units, and international organizations adopted numerical designations for clarity and continuity. For example, the 115th United States Congress, which convened from January 3, 2017, to January 3, 2019, played a pivotal role in shaping national policy during a politically transformative era.

The significance of the 115th extends beyond mere numbering—it often symbolizes milestones or transitions. In sports, the 115th Boston Marathon, held on April 18, 2011, marked a historic moment when Geoffrey Mutai of Kenya set a course record with a time of 2:03:02, though it was not recognized as a world record due to course regulations. Similarly, in military history, the 115th Infantry Regiment traces its roots to World War I, reflecting over a century of service. These examples illustrate how the 115th serves as a marker of legacy, progress, and institutional memory.

How It Works

Understanding the concept of the 115th requires recognizing its function as an ordinal indicator across different domains. Whether referring to time, space, or organizational structure, the number provides a precise reference point that enables tracking, comparison, and commemoration. Below are key applications of the 115th in various contexts, each explained with specific relevance.

Key Details and Comparisons

ContextStart DateDurationKey EventLocation
115th U.S. CongressJanuary 3, 20172 yearsTax Cuts and Jobs ActWashington, D.C.
115th Infantry Regiment1917Over 100 yearsWorld War I deploymentMaryland and Virginia
115th Boston MarathonApril 18, 20111 dayGeoffrey Mutai’s record runBoston, Massachusetts
115th Meridian WestN/A (geographic)ContinuousTime zone boundarySaskatchewan to Nevada
115th Fighter Wing194875+ yearsF-16 operationsMadison, Wisconsin

The comparison above highlights how the number 115 functions differently depending on context—whether as a time-bound legislative session, a long-standing military unit, or a fixed geographic line. The 115th U.S. Congress had a defined two-year term, while the 115th Infantry Regiment has existed in various forms for over a century. In contrast, the 115th meridian is a permanent geographic feature, not subject to change. The 115th Boston Marathon was a single-day event with historical significance, whereas the 115th Fighter Wing continues active service. These distinctions show that while the number is consistent, its application varies in duration, scope, and impact, reflecting the flexibility of ordinal numbering in organizing human and natural systems.

Real-World Examples

The use of '115th' in real-world scenarios underscores its importance in marking achievements, continuity, and identity. For instance, the 115th Infantry Regiment of the U.S. Army, part of the historic 29th Division, participated in the D-Day landings at Omaha Beach on June 6, 1944, playing a crucial role in the Allied advance. This unit, originally organized in 1917, continues to serve in the National Guard, maintaining a legacy of service that spans generations and conflicts.

Similarly, the 115th United Nations General Assembly session in 2010 brought together world leaders to address pressing global issues, including the adoption of the Outcome Document on Nuclear Disarmament. These gatherings exemplify how ordinal numbering helps track diplomatic progress over decades. Below are additional notable examples where the 115th holds significance:

  1. 115th Boston Marathon (2011): Won by Geoffrey Mutai in 2:03:02, marking one of the fastest times in the race’s history.
  2. 115th Fighter Wing: Based at Truax Field, Madison, WI, this Air National Guard unit has supported operations in Iraq, Afghanistan, and NATO missions.
  3. 115th day of 2024: Falls on April 24, a leap year adjustment affecting fiscal calendars and academic schedules.
  4. 115th Meridian East: Passes through Inner Mongolia and Henan Province in China, influencing regional mapping and navigation.

Why It Matters

The designation '115th' is more than a numerical label—it represents continuity, identity, and historical context across institutions and events. By assigning ordinal numbers, societies preserve memory, track progress, and honor legacy, whether in governance, military service, or cultural traditions. The following impacts illustrate why such numbering systems are essential to organizational and societal function.

In conclusion, the 115th serves as a vital anchor in both time and space, offering a framework for understanding progress and continuity. From legislative bodies to athletic events, its use ensures clarity, honors tradition, and facilitates organization. As societies continue to evolve, the importance of such ordinal designations remains undiminished, proving that even a number can carry profound meaning.

Sources

  1. 115th United States Congress - WikipediaCC-BY-SA-4.0
  2. 115th Infantry Regiment - WikipediaCC-BY-SA-4.0
  3. Boston Marathon - WikipediaCC-BY-SA-4.0

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