sentences:  The guerrillas who had laid low when the mountain brigade first arrived, soon began to strike at the commando units.It was during the second week of February that a platoon from the commando companies was ambushed at Río Pueblo Viejo, resulting in the deaths of an NCO and two guerrillas.On 24 February, while supporting troops on the ground, a Piper PA-18 crashed near the town of Ingenio Santa Lucía, killing its two crewmen.