Pledging to “rethink grocery” behind a combination of quality, convenience and value, Lidl US on Wednesday revealed that its first U.S. stores would open June 15.

Lidl, a division of German retailer Schwarz Group with U.S. headquarters in Arlington, Va., also provided locations of the 20 stores it said it would open this summer but did not reveal how many of those would open their doors in June.

Lidl’s entry promises additional points of pressure to a U.S. grocery market already struggling with overcapacity, slowing sales affected by deflation and price competitiveness threatening profits. Anticipation of its arrival has been a driving factor in any number of events in recent years, from the Ahold-Delhaize merger, to Walmart’s price and service investments, to stepped-up renovations and expansion of its German counterpart Aldi.