By Jack Queen and Dietrich Knauth

(Reuters) -A trial beginning Wednesday in Portland, Oregon will determine whether President Donald Trump lawfully ordered the National Guard to the city to quell protests, a test of his controversial use of military force in American cities.

A federal judge will decide whether protests at an immigration facility in the city constituted a rebellion or prevented federal agents from enforcing the law, justifying the troop deployment, in what appears to be the first time the use of the law has been tested in a trial.

The deployment was a rare break with a centuries-old taboo against using troops on American soil.

CLAIMS OF VIOLENCE

The City of Portland and the Oregon attorney general’s office sued the Trump administration and accused it of acting unlawful

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