NATO soldiers are already in Ukraine for arms control, intelligence operations and training. El Pais writes about this, citing sources.

The publication reports that foreign employees in Ukraine transmit information to their countries about the situation at the front, determine the effectiveness of the weapons provided, possible problems during their use, and identify possible cases of corruption in the provision of assistance.

Sometimes these are retired foreign soldiers who fight as volunteers in the ranks of the Ukrainian Armed Forces, El Pais writes.

However, no participation of foreign active military in hostilities has been recorded over the past 2 years.