Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Defendo

Defendo is a Canadian military martial art and a self defence system created during WWII for law enforcement structures by veteran instructors. Creator Bill Underwood had created Combato in 1910, at 15 years old. A "non-boxing or wrestling" unarmed combat system which he taught in Montreal, Quebec, and Toronto, Ontario. Underwood was the first to bring…

History & Art

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Defendo. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Also known as
Combato, Underwood Systems
Country of origin
Canada
Creator
Canadian Forces
Focus
Hybrid
Olympic sport
no
Parenthood
Jujutsu, Western Grappling, Boxing, fencing

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

History

Media

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Defendo

Nodes32
Edges31
Triples70
Avg. degree1.94
Density0.0625
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Defendo

Top relations

related to Media · 23
Defendo → Academy Awards, Between, Bill, Don't Mess, February, From, He, Hollywood's, In, John Watson, Johnny Carson, Merv Griffin, Newmarket, North American, Ontario, Oscar, Pen Densham, Real People, That's Incredible, The
related to history · 22
Defendo → American, American FBI, Army Rangers, As, August, Canadian, Canadian Forces, Canadian Forces Base Trenton, Combato, He, Japanese, Liverpool, New York City, Pat, Pat Underwood, Taro Miyake, The, Underwood, Underwood's, United States
related to A new name · 11
Defendo → Canada, From, In, Occidental System, Police System, Self-Defence, Self-Protection, UK, Underwood, United States, USA
related to External links · 7
Defendo → Archived, British Jiu Jitsu, DefendoThe Canadian Modern Combato, Society, The Art, The National Post, Wayback MachineThe Toronto School
Also known as · 1
Defendo → Combato, Underwood Systems
Country of origin · 1
Defendo → Canada
Creator · 1
Defendo → Canadian Forces
Focus · 1
Defendo → Hybrid
Olympic sport · 1
Defendo → no
Parenthood · 1
Defendo → Jujutsu, Western Grappling, Boxing, fencing

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

underwood system combato canadian military created name law enforcement teaching canada new ontario creator toronto jujutsu pat 1950 american self-defence

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
DefendoAlso known asCombato, Underwood Systems1.00infobox
DefendoCountry of originCanada1.00infobox
DefendoCreatorCanadian Forces1.00infobox
DefendoFocusHybrid1.00infobox
DefendoOlympic sportno1.00infobox
DefendoParenthoodJujutsu, Western Grappling, Boxing, fencing1.00infobox
Defendois aCanadian military martial art and a self defence system created during WWII for law enforcement structures by veteran instructors0.90text
Defendorelated to A new nameFrom0.60section
Defendorelated to A new nameUnderwood0.60section
Defendorelated to A new nameCanada0.60section
Defendorelated to A new nameUSA0.60section
Defendorelated to A new nameIn0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.