Amazon is facing pressure in its biggest market outside the U.S.

Trade union Verdi called on workers at seven German Amazon warehouses to go on a three-day strike.

The walk out would coincide with "Black Friday" discount shopping sales on November 27th.

Scheduled to begin with Wednesday's night shift, Verdi is demanding better pay and working conditions.

It's been organising strikes at Amazon in Germany since 2013.

Most recently last month during its "Prime Day" promotional event.

An Amazon spokesman said at the time that the company offered "excellent" salaries.

Adding that benefits and working conditions are comparable with other important employers.

The U.S. retail giant has seen sales soar globally as restrictions sent consumers online.

Many traditional shops by comparison have struggled to compete.

Verdi argues this has strengthened the case for higher wages.

And says workers were not sufficiently protected against the spread of the coronavirus.

Last week, Amazon bowed to government pressure in France.

It postponed its local Black Friday event by a week to help local shopkeepers struggling with a nationwide lockdown.