When the Revolution of 19 April 1810 was taking place, it was reported that Ribas was seen travelling throughout the entire city, encouraging people to join-in the demonstrations against Spanish rule.
Apart from his political functions in the interim government, and despite having no military background, Ribas was named Colonel of the Barlovento Battalion which he helped set up with his own funds.
Along with other fellow Republicans, he became a member of the Sociedad Patriótica organized by Francisco de Miranda, in contradistinction to the New Venezuelan Congress which was ruled mostly by the landed few.
The Sociedad Patriótica was modeled after a French Jacobin Club, encouraging the practice of oratory on equality of rights to all citizens.
After many hours of fierce resistance, Republican reinforcements arrived under the command of Vicente Campo Elías.
He fought vigorously in the Battle of Urica in which the republican forces lost but his royalist nemesis Boves was killed.