On 7 February 1935 some 5,000 Paraguayans attacked the heavily fortified Bolivian lines near Villa Montes , with the aim of capturing the oilfields at Nancarainza .
Paraguayans were beaten back by the Bolivian First Cavalry Division .
On 7 February 1935 some 5,000 Paraguayans attacked the heavily fortified Bolivian lines near Villa Montes , with the aim of capturing the oilfields at Nancarainza , but they were beaten back by the Bolivian First Cavalry Division .