“Should
one of the Contracting Parties become engaged in
hostilities with a European Power in consequence of
aggression by the latter against the Contracting Party,
the other Contracting Party were at once give the
Contracting Party engaged in hostilities all the support
and assistance in its power.”

“The
Polish Government and the Government of the United
Kingdom of Great Britain and Northern Ireland are agreed
upon the following interpretation of the

Agreement of
Mutual Assistance signed this day as alone authentic and
binding: 1
(a) By the expression ‘a European Power’ employed in this
agreement is to be understood
Germany.”