Members and supporters of the Burgerville Workers Union marked their campaign’s one year anniversary by demonstrating outside a handful of local Burgerville restaurants April 26.

At the fast food chain’s Southeast 26th and Powell location, across the street from Cleveland High School, union supporters handed out free pizza to students — while making an appeal not to eat lunch at Burgerville that day. Students enthusiastically took them up on the deal, and many agreed to wear union pins that read “Cleveland Stands With Burgerville Workers Union.”

At other locations, supporters entered restaurants and locked arms in front of the counter, briefly shutting down sales.

The Convention Center location has been repeatedly targeted by union demonstrations, including a Feb. 25 demonstration in which over 100 members of SEIU Local 49 marched into the store holding signs, and an Oct. 25 demonstration at which supporters surrounded the store and handed out free burgers supplied by the Carpenters Union.

Burgerville Workers Union, affiliated with the Industrial Workers of the World, is calling for a $5 an hour raise for all Burgerville workers. They currently make at or near the legal minimum wage.

Corporate has not been friendly to the union effort: In letters and a video all employees were made to watch, Burgerville CEO Jeff Harvey argued against a union, saying it would not be in the best interest of employees. And several open union supporters have been fired by the company since the campaign launched.

At the Vancouver Plaza Burgerville, union supporter Jordan Vaandering was fired Jan. 18, ostensibly for failing to pay for a bagel that a manager served him while on break. The next day he marched with supporters into the store and demanded his job back. Burgerville called the police and had him arrested for trespass.

Since Burgerville Workers Union publicly announced itself on April 26, 2016, their campaign has received a statement of support from Bernie Sanders, and endorsement by the Oregon AFL-CIO and half a dozen other labor organizations. Union members and supporters have engaged in a variety of tactics, including brief store occupations and wildcat placement of tip jars (soon taken down by managers). In February, the union announced the launch of a benefits program, including food boxes, discounted bus passes, up to 4 hours a month of free babysitting, and GED test preparation classes.

The union has so far stopped short of calling for an ongoing boycott of the 42-store chain.

MORE: Find out more about the Burgerville Workers Union at burgervilleworkersunion.org, and keep up with the latest developments by liking the group’s page at facebook.com/burgervilleworkersunion.