I recently read about a strange trend: [Since the start of the 20th century](https://en.wikipedia.org/wiki/List_of_wars_involving_the_United_States#20th-century_wars), the United States has stepped in or started conflicts involving the direct use of military force mainly under presidents from the [Democratic Party](https://en.wikipedia.org/wiki/Democratic_Party_(United_States)).

**Is this trend really present?**