The Pentagon said Friday it is seeking bids from the four largest cloud providers for a controversial multibillion-dollar contract that has taken years to award.

The Defense Department announced it has issued solicitations to Amazon.com Inc.
AMZN,
+1.32%,
Microsoft Corp.
MSFT,
+0.87%,
Alphabet Inc.’s Google
GOOGL,
+0.14%
 
GOOG,
+0.22%,
and Oracle Corp.
ORCL,
-0.13%
to bid for spots on the Joint Warfighting Cloud Capability (JWCC), the successor to the $10 billion Joint Enterprise Defense Infrastructure (JEDI). The latter contract stalled and was eventually canceled following a flurry of protests and lawsuits from Amazon and Oracle.