On 5 February 1794, José Urrutia y de las Casas attacked a fortified hilltop near Hendaye and was defeated in the Battle of Sans Culottes Camp.

[2][3] On 3 June, a 2,300-man French brigade led by Lavictoire stormed Casa Fuorte, a position at the Izpegi Pass (Col d'Ispeguy), 13.5 kilometres (8.4 mi) west of Saint-Jean-Pied-de-Port.

The 1,000 defenders, including a battalion of the Spanish Zamora Infantry Regiment, three companies of the Aldudes Rifles, and the French Émigré Légion Royal, lost 94 killed and wounded, plus 307 captured.

[4] On 23 June, Captain General Ventura Caro with 8,000 infantry and 500 cavalry and artillery unsuccessfully assailed Mont Calvaire near Bera (Vera).

By between 27 and 30 July, the Spanish defenses were overcome and Moncey turned his divisions northward to follow the Bidasoa to the Atlantic coast.

Emerging from the mountains on 1 August, Moncey fell upon the Spanish coastal defenses from the flank and rear with 12,000 men, capturing the San Marcial heights southeast of Irun and Hondarribia (Fuenterrabia).