Jossi Feld was a policeman from Tarbunt City on Milagro. By 1,387 BBY he had achieved the rank of commander, and expected to retire at that rank. He made a point of maintaining proficiency with his department's service pistol and rifle and took a vested interest in the careers and welfare of his subordinates.
In 1,387 BBY Milagro was invaded first by Zirist Lakalt, then mere days later by the Sith Overlord Vedya Gasald. Most of Milagro's army, already weakened by Lakalt's campaign, was wiped out by Darth Vaszas and his invasion force, and Milagro's law enforcement departments struggled to protect their citizens. Tarbunt City fell to a tertiary invasion force nominally commanded by the Anzat Darth Vandak.
With most of his department wiped out, Feld made contact with other survivors and army veterans to organize what became the Milagro Resistance. He encountered the Jedi Knight Mali Darakhan, and brought the Darakhan's six-Jedi strike team into the fold, but was quickly faced with difficulties when the resisters' desire for substantive victories clashed with the Jedi's more cautious style. When some resisters interpreted a communication from Darth Vaszas to mean that the resistance would be spared if it surrendered the Jedi, Feld instructed his fighters to support the Jedi in the field, but also did not warn Darakhan about the possible betrayal.