This is the 563rd most frequent German word.
deutschlands
"Deutschlands" means "Germany's" (possessive form of "Germany").
The word 'Deutschlands' is used in the genitive case to denote possession, indicating that the 'history' belongs to Germany.
Die Geschichte Deutschlands ist sehr reichhaltig und faszinierend.
The history of Germany is very rich and fascinating.
Here, 'Deutschlands' in the genitive case specifies the relationship of capital (Hauptstadt) to Germany, showing possession or belonging.
Die Hauptstadt Deutschlands ist Berlin.
The capital of Germany is Berlin.
The use of 'Deutschlands' here is to describe that the landscapes are attributes of Germany, again employing the genitive case to show possession.