Around 3 August García moved his entire army forward to Chunpich, and by October Spanish soldiers had established themselves near the source of the San Pedro River. By November Tzuktok' was garrisoned with 86 soldiers and more at Chuntuki; in that month García once again returned to Campeche. By December 1695 Ursúa was under pressure to complete the conquest of the Itza, and he approved the despatch of reinforcements along the Camino Real to join the main garrison. The reinforcements included 150 Spanish and pardo soldiers and 100 Maya soldiers, together with labourers and muleteers. An advance group of 150 mixed Maya and non-Maya soldiers met up with García at Campeche and proceeded southwards along the Camino Real towards the San Pedro River. The rest of the reinforcements did not leave Campeche until March 1696.

How many months after the first reinforcements departed did the second leave?
3