The English colonies in North America were united by all but which of the following:

A uniform language based on the London English dialect.
Traditional English inheritance laws.
An uncomplicated legal system with few professional lawyers.
Military concepts based on volunteer militia and the use of terror tactics.
Widespread ownership of land.

I am not certain of the colonies being united on military terror tactics.

To confirm if the English colonies in North America were united by military concepts based on volunteer militia and the use of terror tactics, we can analyze the given options and their relevance to colonial unity:

1. A uniform language based on the London English dialect: This is a characteristic that could contribute to unity, as it establishes a common means of communication among the colonies.

2. Traditional English inheritance laws: Similar inheritance laws can promote a sense of familiarity and shared legal principles across the colonies, potentially contributing to unity.

3. An uncomplicated legal system with few professional lawyers: The presence of a relatively simple legal system with fewer professional lawyers could facilitate easier understanding and implementation of laws, fostering unity.

4. Military concepts based on volunteer militia and the use of terror tactics: This option suggests that the colonies were united by the adoption of volunteer militia and the use of terror tactics in their military strategies. However, it is unlikely that terror tactics would be a unifying factor, as it typically implies aggression or violence against others, which is not a desirable foundation for unity.

5. Widespread ownership of land: If the colonies had a widespread ownership of land, it could contribute to a common interest, economic stability, and a sense of shared prosperity, which can promote unity.

After considering these factors, we can conclude that the English colonies in North America were most likely not united by military concepts based on volunteer militia and the use of terror tactics.