Del Pilar was present in the Tejeros Convention on March 22, 1897, which marked the split between the Magdiwang and Magdalo factions of the Katipunan.
The presence of Del Pilar at the Tejeros Convention on March 22, 1897, was a significant event that led to the emergence of two distinct groups within the Katipunan: the Magdiwang and Magdalo factions.