Comparing the number of “wars started” is a complex task because the definition of “starting” a war is often a matter of intense geopolitical debate. Historians and political scientists usually distinguish between formally declared wars, unilateral military interventions, and border skirmishes.
As of March 2026, the data shows a significant disparity between the United States and other global powers in terms of foreign military activity.
1. The United States: A Global Superpower History
Since its inception in 1776, the U.S. has maintained one of the most active militaries in human history.
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Total Interventions: According to the Congressional Research Service (CRS) and academic databases, the U.S. has engaged in nearly 400 military interventions abroad.
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Declared Wars: Technically, the U.S. has only formally declared war in 5 conflicts (11 separate declarations): the War of 1812, Mexican-American War, Spanish-American War, WWI, and WWII.
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Post-WWII Activity: More than half of all U.S. interventions have occurred since 1950. In the 21st century alone, the U.S. has been involved in over 30 high-level combat operations, including the recent Operation Epic Fury in early 2026.
2. China (PRC): The “Self-Defense” Narrative
The People’s Republic of China (PRC), founded in 1949, claims it has “never started a war.” However, historians point to several major conflicts where the PRC was a primary combatant:
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Total Major Conflicts: Approximately 11 to 15 major military engagements.
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Key Wars: The Korean War (1950), the Sino-Indian War (1962), and the Sino-Vietnamese War (1979).
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Perspective: China officially classifies these as “counter-attacks in self-defense.” For example, they view the 1962 war with India as a response to border encroachments.
3. Comparison Table: Top Global Powers
This table compares military interventions and major conflicts for the “Top 5” powers since 1945 (to make the comparison fair, as many modern states didn’t exist in 1776).
| Nation | Approximate Military Interventions (Post-1945) | Primary Geographic Focus |
| United States | 220+ | Global (Middle East, Latin America, Asia) |
| Russia / USSR | 45 – 55 | Eastern Europe, Central Asia, Middle East |
| France | 35 – 45 | Africa (former colonies), Middle East |
| United Kingdom | 30 – 40 | Middle East, Africa, Falklands |
| China (PRC) | 11 – 15 | Border regions (India, Vietnam, Korea) |
Summary Analysis
The U.S. has a vastly higher count of military interventions compared to any other nation in the top 10. This is largely due to its post-1945 role as the “global policeman” and its network of hundreds of overseas bases. In contrast, other nations like India, Germany, and Japan have remarkably low numbers of foreign interventions since 1945, often limited to UN peacekeeping or internal border security.
While China has fewer “foreign” wars, it has focused its military energy on internal control (Tibet, Xinjiang) and maritime disputes in the South China Sea, which are often classified as “gray zone” activities rather than full-scale wars.
U.S. vs China: A History of Conflict
This video provides a deep dive into the historical military engagements between the two superpowers and how their different strategic goals have led to varying levels of global intervention.