When playing a unit without any abilities to your base, does your opponent get the chance to play reactions?

Ruling: No, opponents cannot react to units being played. Units are removed from the chain immediately when finalized and do not linger on the chain for players to gain priority and respond.

Sequence:

• When you play a unit, the chain is created with the unit as pending
• When you finalize the unit, it is removed from the chain immediately
• If the unit was the only thing on the chain, the chain closes
• At no point does a player gain priority during this process

Nuances:

• If a unit has abilities that go on the chain, opponents can react to those abilities (just not the unit itself)
• Abilities that play units (like Vanguard Captain creating 2 recruits) can be responded to, but the unit tokens themselves cannot be responded to once they are played
• Units and gear resolve immediately when finalized and do not progress to the Execute step